TEAS Science Practice Test 153 Questions with Verified Answers
Pancreatic secretions that aid in digestion of food are produced by which of the
... [Show More] following types of cells?
a. islet alpha cells
b. islet beta cells
c. acinar cells
d. sphincter cells - CORRECT ANSWER c. acinar cells
which of the following is the collagen rich material that connects muscles to bones?
a. tendon
b. ligament
c. reticular tissue
d. areolar tissue - CORRECT ANSWER a. tendon
which of the following statements best explains why RNA inside a cell is almost never found as a single stranded molecule?
a. alleles for genes are found in pairs, so their RNAs also pair up
b. RNA normally exists with its complimentary strand within a double helix
c. RNA and DNA form hybrid pairs for all transcribing parts of the chromosome
d. shorts stretches of complimentary sequences can cause RNA to fold back on itself - CORRECT ANSWER d. short stretches of complimentary sequences can cause RNA to fold back on itself
which of the following is the circular muscle that regulates opening and closing of a body aperture?
a. fosa
b. fascia
c. sphincter
d. valve - CORRECT ANSWER c. sphincter
the sliding filament theory proposes that which of the following occurs during the contraction phase of muscle?
a. the sarcomeres shorten
b. myosin degenerates
c. actin binds calcium ions
d. ATP is produced by myosin - CORRECT ANSWER a. the sarcomeres shorten
which of the following is an irregular bone of the throat that aids in tongue movement and swallowing?
a. stapes
b. hyoid
c. ischium
d. calcaneus - CORRECT ANSWER b. hyoid
which of the following hormones is involved in the process of labor and childbirth?
a. luteinizing hormone
b. gonadotrophin releasing hormone
c. thyroxine
d. oxytocin - CORRECT ANSWER d. oxytocin
which of the following is a type of specialized antigen-processing cell that activates T-cells of the immune system?
a. plasma cells
b. thrombocytes
c. dendritic cells
d. eosinophils - CORRECT ANSWER c. dendritic cells
mammary glands are a modified type of which of the following glands?
a. sebaceous glands
b.endocrine glands
c. eccrine glands
d. apocrine glands - CORRECT ANSWER d. apocrine glands
which of the following options lists the correct order of events in a signaling pathway in a feedback loop used to maintain homeostasis?
a. receptor, effector, integration, stimulus, response
b. receptor, stimulus, integration, response, effector
c. stimulus, effector, integration, receptor, response
d. stimulus, receptor, integration, effector, response - CORRECT ANSWER d. stimulus, receptor, integration, effector, response
which of the following pairs of endocrine glands are linked by a venous blood portal system?
a. liver and pancreas
b. hypothalamus and anterior pituitary
c. pancreas and spleen
d. anterior pituitary and thyroid - CORRECT ANSWER b. hypothalamus and anterior pituitary
adipose tissue is stored in which of the following layers of the skin?
a. epidermis
b. dermis
c. hypodermis
d. dermal papillae - CORRECT ANSWER c. hypodermis
which of the following causes lactic acid to build up in muscle cells?
a. the lack of oxygen leading to increased fermentation
b. an excess of carbon dioxide redirected to make lactic acid
c. the decrease in. glucose supply to the muscle
d. an increase in blood supply to the muscle - CORRECT ANSWER d. the lack of oxygen leading to increased fermentation
which of the following fetal tissues contributes to the formation of the placenta?
a. hematopoietic cells
b. embryonic yolk sac
c. fetal chorionic tissue
d. fetal muscle tissue - CORRECT ANSWER c. fetal chorionic tissue
which of the following events describes an acquired (adaptive) immune response?
a. B-cells release antibodies targeted to a bacterial pathogen
b. macrophages migrate to a site of infection to engulf pathogens
c. lysozymes digest microbial cells walls
d. complement proteins mediate reactions leading to the lysis of invading cells - CORRECT ANSWER a. b-cells release antibodies targeted to a bacterial pathogen
which of the following results from the immune system attacking an individual's own healthy tissue?
a. lupus
b. AIDS
c. asthma
d. atherosclerosis - CORRECT ANSWER a. lupus
three liquids are being studied. samples of liquid 1 and liquid 2 are placed in a container together. liquid 1 rises to the top. another sample of liquid 1 is placed in a different container together with liquid 3. this time, liquid 3 rises to the top. if all three liquids are layered in one container, which of the following would be the correct order of the liquids from top to bottom?
a. 2,3,1
b. 3,2,1
c. 1,3,2
d. 2,1,3 - CORRECT ANSWER d. 2, 1, 3
plants return water from their leaves to the atmosphere as water vapor. what is the name of this process?
a. sublimation
b. transpiration
c. accumulation
d. condensation - CORRECT ANSWER b. transpiration
which of the following is the main energy-generating organelle of a sperm cell?
a. acrosome
b. mitochondria
c. axoneme
d. nucleus - CORRECT ANSWER b. mitochondria
if an investigation is designed to find the rate of respiration, which of the following must be measured as the independent variable?
a. time
b. mass
c. volume
d. density - CORRECT ANSWER a. time
in which of the following locations do most of the white blood cells originate?
a. bone marrow
b. pancreas
c. spleen
d. large. intestine - CORRECT ANSWER a. bone marrow
which of the following is part of the large intestine?
a. duodenum
b. rectum
c. ileum
d. jejunum - CORRECT ANSWER b. rectum
which of the following anatomical planes divides the body into superior and inferior portions?
a. sagital
b. median
c. transverse
d. frontal - CORRECT ANSWER c. transverse
which of the following cells rid the body of dust and other particles that enter the lungs?
a. alveoli
b. macrophages
c. sertoli cells
d. erythrocytes - CORRECT ANSWER b. macrophages
which of the following will occur if a person who has blood type A receives blood type B?
a. B antigens on the surface of the recipients red blood cells will cause their red blood cells to clump
b. antibodies against blood type B will be produced in the recipients blood plasma
c. existing antibodies against blood type A in the recipients blood plasma will cause red blood cells to clump
d. people who have blood type A can receive blood type B with no reaction - CORRECT ANSWER b. antibodies against blood type B will be produced in the recipients blood plasma
which of the following cell types confers waterproofing on the outer layers of skin?
a. melanocytes
b. keratinocytes
c. merkel cells
d. langerhans cells - CORRECT ANSWER keratinocytes
which of the following is improved when repeated trials of an experiment have consistent results?
a. reliability
b. validity
c. independent variables
d. dependent variables - CORRECT ANSWER reliability
which of the following connects the ovaries to the uterus?
a. vas deferens
b. ureters
c. fallopian tubes
d. urethra - CORRECT ANSWER c. fallopian tubes
in human blood types, A and B are codominant and O is recessive. which combination of the mother's and father's genotypes has the highest probability of producing a child with blood type AB?
a. AB and BO
b. AO and BO
c. AA and BB
d. AB and AB - CORRECT ANSWER c. AA and BB
which of the following hormones is released in response to a drop in blood pressure?
a. melatonin
b. somatostatin
c. oxytocin
d. aldosterone - CORRECT ANSWER d. aldosterone
which of the following is the cellular organelle that stores calcium ions in skeletal muscle?
a. golgi apparatus
b. sarcoplasmic reticulum
c. lysosome
d. centriole - CORRECT ANSWER b. sarcoplasmic reticulum
what happens when a skeletal muscle is in a relaxed state?
a. ca2+ is released into the cytosol of the muscle cell
b. myosin forms cross bridges with actin filaments
c. tropomyosin covers myosin binding sites
d. ATP binds to myosin heads - CORRECT ANSWER c. tropomyosin covers myosin binding sites
which of the following hormones requires iodine for its production?
a. thyroid hormones
b. melatonin
c. parathyroid hormone
d. calcitonin - CORRECT ANSWER a. thyroid hormones
which of the following best describes the arrangement and motions of molecules in a liquid?
a. molecules are packed closely with no regular arrangement and vibrate with constant rapid motion
b. molecules are widely separated in a regular pattern with no molecular motion
c. molecules are widely separated in a random pattern and vibrate freely at high speeds
d. molecules are tightly packed in a regular pattern and do not slide past one another - CORRECT ANSWER a. molecules are packed closely with no regular arrangement and vibrate with constant rapid motion
a patient who has a mutation that causes diabetes type 1 mellitus is trying a therapy that will use their own stem cells to restore their insulin production. before their stem cells can be used for therapy, which of the following should be done?
a. the stem cells should be inactivated with UV radiation
b. a normal gene should be supplied in place of the defective one before therapy
c. the patient should be counseled about passing on genetically altered cells to offspring
d. the patient should be tested to ensure that their body will not reject the stem cell - CORRECT ANSWER b. a normal gene should be supplied in place of the defective one before therapy
damage to which of the following sites will most likely result in the stunted growth of a prepubescent child?
a. physis
b. shaft
c. periosteum
d. endosteum - CORRECT ANSWER a. physis (growth plate)
which of the following describes the action of histamine as a response to a bee sting?
a. histamine dilates blood vessels, which increases blood flow to the area
b. histamine degrades antigens through its catalytic activity
c. pathogens become trapped in histamine and are unable to infect the body
d. histamine triggers the release of the protein interferon - CORRECT ANSWER a. histamine dilates blood vessels, which increases blood flow to the area
which of the following is the function of the spleen in a healthy adult human?
a. it stores bile produced in the liver
b. it synthesizes platelets
c. it degrades aged red blood cells
d. it is a vestigial organ - CORRECT ANSWER c. it degrades aged red blood cells
the innermost lining of the digestive tract is largely comprised of which of the following?
a. serous mesothelium
b. stratified squamous epithelium
c. smooth muscle
d. mucous membrane - CORRECT ANSWER d. mucous membrane
which of the following chemicals is a mineral that provides mechanical strength and is found in teeth and bones?
a. sodium chloride
b. calcium carbonate
c. calcium hydroxyapatite
d. sodium aluminosilicate - CORRECT ANSWER c. calcium hydroxyapatite
which of the following bones is the is the large fused bone of the upper jaw that contains teeth?
a. mandible
b. maxilla
c. vomer
d. clavicle - CORRECT ANSWER b. maxilla
which of the following occurs at the beginning of systole in a healthy heart?
a. the ventricles contract
b. the atria contract
c. the mitral valve opens
d. the tricuspid valve opens - CORRECT ANSWER a. the ventricles contract
which of the following is a structure of the inner ear?
a. tympanic membrane
b. cochlea
c. stapes
d. auricle - CORRECT ANSWER b. cochlea
which of the following structures of the respiratory system is the site of gas exchange?
a. pleurae
b. alveoli
c. trachea
d. bronchioles - CORRECT ANSWER b. alveoli
bile aids in the digestion of which of the following?
a. fat
b. protein
c. vitamins
d. carbohydrates - CORRECT ANSWER a. fat
which of the following is the average length of the female urethra?
a. 1-1.5 inches
b. 2-2.5 inches
c. 5-5.5 inches
d. 6-6.5 inches - CORRECT ANSWER a. 1 to 1.5 inches
which of the following tissue attaches muscle to bone?
a. fascia
b. tendon
c. ligament
d. bursa - CORRECT ANSWER b. tendon
which of the following antibody types mediates the body's response to an allergen?
a. IgA
b. IgD
c. IgE
d. IgG - CORRECT ANSWER c. IgE
where are nutrients absorbed when transported into the blood stream?
a. stomach
b. gallbladder
c. pancreas
d. small intestine - CORRECT ANSWER d. small intestine
blood cells are produced by which of the following?
a. red bone marrow
b. lamellae
c. lacunae
d. yellow bone marrow - CORRECT ANSWER a. red bone marrow
which of the following is the function of surfactant in the alveoli of the lungs?
a. uptake of oxygen in the alveoli
b. prevention of alveoli collapse
c. removal of carbon dioxide in the alveoli
d. increase alveoli surface tension - CORRECT ANSWER b. prevention of alveoli collapse
which of the following is associated with wound healing by primary intention?
a. minimal scar tissue
b. prolonged healing time
c. formation of granulation tissue
d. contraction of wound edges - CORRECT ANSWER a. minimal scar tissue
in the process of wound healing, which of the following plays a role in clearing a wound of cellular debris?
a. mast cells
b. fibroblasts
c. platelets
d. neutrophils - CORRECT ANSWER d. neutrophils
which of the following hormones or enzymes is involved in fluid balance and is produced by the kidneys?
a. renin
b. aldosterone
c. antidiuretic hormone
d. angiotensin I - CORRECT ANSWER a. renin
which of the following parts of the central nervous system is responsible for the control of involuntary respiration?
a. medulla oblongata
b. cerebellum
c. parietal lobe
d. hypothalamus - CORRECT ANSWER a. medulla oblongata
the release of histamine is associated with which of the following?
a. macrophages
b. t-cells
c. neutrophils
d. mast cells - CORRECT ANSWER d. mast cells
which of the following is the hormone that regulates urine output?
a. thyroid stimulating
b. antidiuretic
c. adrenocorticotropic
d. follicle stimulating - CORRECT ANSWER b. antidiuretic
which of the following is a structure that filters foreign particles from lymphatic fluid?
a. thymus
b. nodes
c. tonsils
d. spleen - CORRECT ANSWER b. nodes
which of the following types of muscle tissue is under voluntary control?
a. smooth
b. cardiac
c. visceral
d. skeletal - CORRECT ANSWER d. skeletal
which of the following hormones is produced by the thyroid gland and is active in calcium metabolism?
a. aldosterone
b. calcitonin
c. thyroxin
d. parathyroid - CORRECT ANSWER b. calcitonin
which of the following structures prevents food from being aspirated into the lungs?
a. larynx
b. epiglottis
c. esophagus
d. nasopharynx - CORRECT ANSWER b. epiglottis
which of the following pituitary hormones stimulates the process of gametogenesis?
a. oxytocin
b. prolactin
c. luteinizing hormone
d. follicle stimulating hormone - CORRECT ANSWER d. follicle stimulating hormone
which of the following is a result of the process of meiosis?
a. the fertilization of an ovum takes place
b. a somatic cell divides
c. sperm and ova are produced
d. cell death occurs - CORRECT ANSWER c. sperm and ova are produced
which of the following is a wax like substance secreted by glands in the external ear canal?
a. mucus
b. cerumen
c. sweat
d. sebum - CORRECT ANSWER b. cerumen
after passing through the glottis, inspired air then travels through which of the following structures?
a. larynx
b. trachea
c. pharynx
d. bronchi - CORRECT ANSWER a. larynx
which of the following occurs as a result of the release of antidiuretic hormone?
a. the renal tubules absorb less water
b. urine becomes less concentrated
c. fluid volume in the body increases
d. insensible water loss increases - CORRECT ANSWER c. fluid volume in the body increases
which of the following is a site of sperm maturation in the male reproductive system?
a. seminal vesicles
b. vas deferens
c. epididymis
d. prostate gland - CORRECT ANSWER c. epididymis
when blood leaves the left ventricle of the heart, which of the following structures does it enter next?
a. aorta
b. inferior vena cava
c. pulmonary artery
d. pulmonary vein - CORRECT ANSWER a. aorta
which of the following tissues connects bones to joints?
a. fascia
b. muscle
c. cartilage
d. ligaments - CORRECT ANSWER d. ligaments
which of the following is the correct order of the protective meningeal layers of the brain from inside to outside?
a. dura mater, pia mater, arachnoid
b. arachnoid, dura mater, pia mater
c. pia mater, arachnoid, dura mater
d. arachnoid, pia mater, dura mater - CORRECT ANSWER c. pia mater, arachnoid, dura mater
blood pH is measured by the gain and loss of which of the following?
a. bicarbonate
b. carbon dioxide
c. hydrochloric acid
d. hydrogen - CORRECT ANSWER d. hydrogen
which of the following is the function of angiotensin II in the regulation of blood pressure?
a. vasoconstriction
b. vasodilation
c. increased heart rate
d. decreased heart rate - CORRECT ANSWER a. vasoconstriction
which of the following is an iron containing component of a red blood cell?
a. fibrinogen
b. albumin
c. hemoglobin
d. erythropoietin - CORRECT ANSWER c. hemoglobin
which of the following is responsible for the regulation of body temperature?
a. cerebellum
b. pons
c. hypothalamus
d. parietal lobe - CORRECT ANSWER c. hypothalamus
which of the following is a function of the liver?
a. lipid metabolism
b. electrolyte reabsorption
c. erythropoietin production
d. insulin synthesis - CORRECT ANSWER a. lipid metabolism
which of the following mediates the body's response to stress?
a. cortisol
b. calcitonin
c. thyroid stimulating hormone
d. growth hormone - CORRECT ANSWER a. cortisol
which of the following structures comes after the ascending colon?
a. ileocecal valve
b. transverse colon
c. rectum
d. appendix - CORRECT ANSWER b. transverse colon
which of the following does the respiratory system eliminate when there is an excess of hydrogen ions in the body?
a. oxygen
b. carbon dioxide
c. bicarbonate
d. lactic acid - CORRECT ANSWER b. carbon dioxide
which of the following blood vessels carry deoxygenated blood to the right atrium of the heart?
a. anterior and posterior coronary arteries
b. brachial and cephalic veins
c. left and right carotid arteries
d. superior and inferior vena cavae - CORRECT ANSWER d. superior and inferior vena cavae
breastfeeding of an infant provides which of the following types of immunity?
a. artificial active
b. natural active
c. artificial passive
d. natural passive - CORRECT ANSWER d. natural passive
which of the following is the function of the ureters?
a. to conduct urine from the kidneys to the bladder
b. to conduct urine from the bladder to outside the body
c. to move filtrate from the glomerulus to the loop of henle
d. to move filtrate from the loop of henle to the collecting duct - CORRECT ANSWER a. to conduct urine from the kidneys to the bladder
which of the following functions is associated with the dermal layer of the skin?
a. collagen formation
b. vitamin d activation
c. melanin production
d. storage of extra calories - CORRECT ANSWER a. collagen formation
an occurrence of too high of a concentration of which of the following electrolytes is associated with cardiac arrhythmias?
a. chloride
b. phosphorus
c. potassium
d. sodium - CORRECT ANSWER c. potassium
which of the following is a function of the gallbladder?
a. production of bile
b. absorption of bile
c. storage of bile
d. elimination of bile - CORRECT ANSWER c. storage of bile
which part of the brain regulates heart rate, respiratory rate, and blood pressure?
a. corpus callosum
b. basal ganglia
c. hypothalamus
d. medulla oblongata - CORRECT ANSWER d. medulla oblongata
calcium concentration in the blood is controlled by which of the following glands?
a. pancreas
b. adrenal
c. parathyroid
d. posterior pituitary - CORRECT ANSWER c. parathyroid
which part of the nephron is closest to the collecting duct?
a. glomerulus
b. loop of henle
c. bowman's capsule
d. distal convoluted tubule - CORRECT ANSWER d. distal convoluted tubule
a normal adult bladder has the capacity to hold up to how many mL of urine before involuntary micturition is likely to occur?
a. 200
b. 400
c. 600
d. 800 - CORRECT ANSWER c. 600
which of the following may indicate a hypersecretion of thyroid hormones?
a. weight loss
b. bradycardia
c. cold intolerance
d. lethargy - CORRECT ANSWER a. weight loss
which of the following electrolytes plays an essential role in the clotting of blood?
a. sodium
b. magnesium
c. calcium
d. potassium - CORRECT ANSWER c. calcium
which of the following structures is located between the descending colon and the rectum?
a. sigmoid colon
b. cecum
c. jejunum
d. ascending colon - CORRECT ANSWER a. sigmoid colon
which of the following is a result of stimulation of the sympathetic nervous system?
a. decreased blood flow to the skeletal muscles
b. increased cardiac output
c. decreased respiratory rate
d. increased urinary output - CORRECT ANSWER b. increased cardiac output
which of the following is the effect of aldosterone secretion on electrolyte levels?
a. calcium levels are decreased
b. sodium levels are increased
c. potassium levels are increased
d. magnesium levels are decreased - CORRECT ANSWER b. sodium levels are increased
which of the following describes the event of ovulation?
a. the fallopian tube moves the ovum to the uterus
b. the oocyte undergoes its first meiotic division
c. the graafian follicle releases an ovum
d. the corpus luteum produced progesterone - CORRECT ANSWER c. the graafian follicle releases an ovum
which of the following substances is involved in the destruction of ingested pathogens?
a. lymphatic fluid
b. stomach acid
c. bicarbonate
d. lipase - CORRECT ANSWER b. stomach acid
straightening the elbow by lowering the hand affects which of the following muscles?
a. biceps brachii
b. triceps brachii
c. brachialis
d. brachioradialis - CORRECT ANSWER b. triceps brachii
which of the following hormones is secreted by the posterior pituitary gland?
a. growth hormone
b. luteinizing hormone
c. adrenocorticotropic hormone
d. antidiuretic hormone - CORRECT ANSWER d. antidiuretic hormone
which of the following types of cells is primarily responsible for the destruction of old cells and invasive micro-organisms?
a. basophils
b. eosinophils
c. B-cells
d. macrophages - CORRECT ANSWER d. macrophages
which of the following ions is most abundant is extracellular fluid?
a. calcium
b. chloride
c. sodium
d. potassium - CORRECT ANSWER c. sodium
which of the following valves prevents backflow of blood from the right ventricle into the right atrium of the heart?
a. aortic
b. tricuspid
c. pulmonic
d. mitral - CORRECT ANSWER b. tricuspid
which of the following is a role of platelets in hemostasis?
a. formation of plugs
b. promotion of vasodilation
c. conversion of prothrombin to thrombin
d. activation of calcium - CORRECT ANSWER a. formation of plugs
which of the following cardiac valves prevents blood from returning to the left ventricle of the heart?
a. pulmonic
b. mitral
c. tricuspid
d. aortic - CORRECT ANSWER d. aortic
production of which of the following is a function of the prostate gland?
a. testosterone
b. fluid to lubricate the head of the penis
c. substance to enhance sperm motility
d. gonadotropin releasing hormone - CORRECT ANSWER c. substance to enhance sperm motility
which of the following structures, located at the end of the ear canal, vibrates when sound waves strike it?
a. acoustic meatus
b. cochlea
c. eustachian tube
d. tympanic membrane - CORRECT ANSWER d. tympanic membrane
peripheral vasodilation results in heat loss through which of the following processes?
a. conduction
b. convection
c. radiation
d. evaporation - CORRECT ANSWER c. radiation
an individual with which of the following blood types can receive only blood of that same type?
a. type O
b. type AB
c. type A
d. type B - CORRECT ANSWER a. type O
in a normally functioning cardiovascular system, where does the heartbeat originate?
a. atrioventricular node
b. bundle of His
c. purkinje fibers
d. sinoatrial node - CORRECT ANSWER d. sinoatrial node
which of the following structures of the gastrointestinal system absorbs iron and bile salts?
a. ileum
b. jejunum
c. colon
d. duodenum - CORRECT ANSWER a. ileum
which of the following is the measurement of the percentage of red blood cells in whole blood?
a. hematocrit
b. hemoglobin
c. mean corpuscular volume
d. reticulocyte count - CORRECT ANSWER a. hematocrit
testosterone production is regulated by which of the following glands?
a. pineal
b. thymus
c. parathyroid
d. pituitary - CORRECT ANSWER d. pituitary
which of the following bones is a component of the appendicular skeleton?
a. xyphoid process
b. symphysis pubis
c. sacrum
d. sternum - CORRECT ANSWER b. symphysis pubis
which of the following processes explains why an individual that has suffered a broken bone and is immobilized for an extended period of time experiences bone mass loss?
a. demineralization
b. muscle atrophy
c. ossifcation
d. kyphosis - CORRECT ANSWER a. demineralization
which of the following food sources provides the majority of the urea that is filtered from the blood via the kidneys?
a. meat and some plant products, such as legumes
b. fruits, such as pineapple and pear
c. lard and various oils, such as vegetable and canola
d. grain products such as breads and pasta - CORRECT ANSWER a. meat and some plant products, such as legumes
which of the following contains the testes?
a. epididymis
b. mesentery
c. prostate
d. scrotum - CORRECT ANSWER d. scrotum
which of the following molecules, if present in urine, indicates a problem with kidney function?
a. albumin
b. creatinine
c. sodium ions
d. water - CORRECT ANSWER a. albumin
which of the following statements correctly matches a body system with its function?
a. the digestive system facilitates absorption of substances into the bloodstream
b. the respiratory system transports oxygenated blood throughout the lungs and body
c. the excretory system prevents harmful substances from entering the body
d. the endocrine system transports hormones from place to place within the body - CORRECT ANSWER a. the digestive system facilitates absorption of substances into the bloodstream
a first degree burn involves which of the following layers of skin?
a. epidermis only
b. epidermis and part of the dermis
c. epidermis and all of the dermis
d. epidermis, dermis, and some muscle and bone - CORRECT ANSWER a. epidermis only
which of the following glands is exclusively found in males?
a. adrenal
b. parathyroid
c. Cowper's
d. pituitary - CORRECT ANSWER c. Cowper's
a researcher decides to repeat an experiment and reassess results first established in the 1930s about why plants grow towards light. which of the following is the best reason for conducting this experiment?
a. plant behavior could have modified due to evolutionary processes since the experiments were first done
b. new breeds of plants discovered since the 1930s have not yet been shown to have the same light responses
c. shifts in average temperatures produced by global warming may affect plants in ways that are not understood.
d. equipment and methods developed since the 1930s may produce better data and provide mechanistic detail - CORRECT ANSWER d. equipment and methods developed since the 1930s may produce better data and provide mechanistic detail
which of the following enzymes breaks down complex carbohydrates?
a. amylase
b. pepsin
c. lactase
d. lipase - CORRECT ANSWER a. amylase
which of the following hormones is produced in the ovaries?
a. estrogen
b. vasopressin
c. prolactin
d. oxytocin - CORRECT ANSWER a. estrogen
what is the role of the urethra?
a. to transport urine out of the body
b. to transport the egg to the uterus
c. to connect the kidneys to the bladder
d. to connect the uterus to the outside of the body - CORRECT ANSWER a. to transport urine out of the body
which of the following glands produces melatonin, the hormone that regulates sleep?
a. thyroid
b. hypothalamus
c. pituitary
d. pineal - CORRECT ANSWER d. pineal
skeletal muscle contraction is stimulated by the neurotransmitter _____, which is released by nerves at the neuromuscular junction
a. acetylcholine
b. nitric oxide
c. dopamine
d. glycine - CORRECT ANSWER a. acetylcholine
If an intensive property is independent of the amount of the material being measured, which of the following is an example of an intensive property?
a. mass
b. volume
c. density
d. length - CORRECT ANSWER c. density
nails are made of a protein called
a. collagen
b. vinculin
c. keratin
d. elastin - CORRECT ANSWER c. keratin
which of these terms specifically means the intake and expulsion of air using the lungs?
a. inspiration
b. aeration
c. ventilation
d. oxygenation - CORRECT ANSWER c. ventilation
pancreatic cells have an abundance of _____ to meet the protein production demands of the cell
a. nuclei
b. mitochondria
c. lysosomes
d. rough endoplasmic reticulum - CORRECT ANSWER d. rough endoplasmic reticulum
cystic fibrosis is a homozygous recessive condition. a genetic counselor should advise concerned parents that, if each of them has a parent who has cystic fibrosis yet neither of the concerned parents is affected, the probability of their potential child having cystic fibrosis is
a. 0%
b. 25%
c. 50%
d. 100% - CORRECT ANSWER b. 25%
the cause of cell differentiation is that different cells
a. contain different DNA
b. have different chromosomes
c. contain similar protein information
d. express alternate genetic information - CORRECT ANSWER d. express alternate genetic information
which of the following is the purpose of using control groups in an investigation?
a. to establish a standard for data comparison
b. to provide the correct answer to an investigation
c. to determine the dependent variables
d. to function as a third variable group - CORRECT ANSWER a. to establish a standard for data comparison
when an enzyme is degraded into its monomeric structural units, the monomers will be
a. monosaccharides
b. fatty acids
c. nucleotides
d. amino acids - CORRECT ANSWER d. amino acids
anxiety about an upcoming final exam causes a student to experience an increase in blood pressure, dilation of the pupils, and a dry mouth. which of the follow nervous system responses is responsible for these physical symptoms?
a. voluntary
b. sympathetic
c. limbic
d. cognitive - CORRECT ANSWER b. sympathetic
which of the following conditions is related to an abnormality in the function of red blood cells?
a. arrhythmia
b. anemia
c. hypertension
d. leukemia - CORRECT ANSWER b. anemia
which of the following layers of the epidermis contains cells that provide protection against UV radiation?
a. stratum corneum
b. stratum lucidum
c. stratum spinosum
d. stratum basale - CORRECT ANSWER d. stratum basale
the lungs are covered by a membrane called the
a. pericardium
b. periosteum
c. symphysis
d. pleura - CORRECT ANSWER d. pleura
seaweed > snail > fish > dolphin. using the food chain above, which of the following terms best describes the trophic level of snails?
a. producer
b. primary consumer
c. secondary consumer
d. tertiary consumer - CORRECT ANSWER b. primary consumer
which of the following explains why gases are "compressible" and liquids are not?
a. particles have fixed volume and are able to occupy the container in which they are contained
b. particles do not have much empty space between them, thus making them rigid
c. particles have a large amount of empty space between them
d. particles are held closely together by intermolecular forces - CORRECT ANSWER c. particles have a large amount of empty space between them
which of the following is the iron containing protein in red blood cells?
a. plasma
b. deoxyribonucleic acid
c. hemoglobin
d. myoglobin - CORRECT ANSWER c. hemoglobin
a blood pressure reading of 120/70 mm Hg refers to arterial pressures recorded during
a. atrial contraction/ ventricular contraction
b. atrial contraction/ ventricular relaxation
c. ventricular contraction/ ventricular relaxation
d. ventricular relaxation/ atrial relaxation - CORRECT ANSWER c. ventricular contraction/ ventricular relaxation
which of the following explains what happens in the circulatory system during hyperventilation?
a. oxygen levels increase, causing an increase in blood pH
b. oxygen levels decrease, causing a decrease in blood pH
c. carbon dioxide levels decrease, causing an increase in blood pH
d. carbon dioxide levels increase, causing a decrease in blood pH - CORRECT ANSWER c. carbon dioxide levels decrease, causing an increase in blood pH
which of the following demonstrates a negative feedback mechanism that occurs in the human body?
a. the release of insulin from the pancreas in response to an increase in blood-sugar levels
b. the release of glucagon from the pancreas in response to an increase in blood-sugar levels
c. the release of oxytocin resulting in uterine contractions as childbirth is underway
d. chemical reactions that result in coagulation due to fibrin being released - CORRECT ANSWER a. the release of insulin from the pancreas in response to an increase in blood-sugar levels
which of the following is part of the small intestine?
a. ileum
b. colon
c. pylorus
d. cecum - CORRECT ANSWER a. ileum
which of the following explains why damage to the spleen is a critical concern?
a. damage to the spleen reduces the production of granulocytes
b. damage to the spleen causes massive blood loss
c. damage to the spleen results in loss of clotting ability
d. damage to the spleen results in decreased red blood cell production and maturation - CORRECT ANSWER b. damage to the spleen causes massive blood loss
which of the following organs stores bile?
a. stomach
b. liver
c. small intestine
d. gallbladder - CORRECT ANSWER d. gallbladder
a blood sample taken from a patient fighting an infection is expected to show
a. reduced white blood cell count
b. elevated white blood cell count
c. elevated red blood cell count
d. reduced red blood cell count - CORRECT ANSWER b. elevated white blood cell count
which of the following is the form of energy contained in nutrient molecules and in ATP's high energy bonds?
a. mechanical energy
b. potential energy
c. kinetic energy
d. radiation energy - CORRECT ANSWER b. potential energy
which of the following cell types produces antibodies?
a. T-cells
b. dendritic cells
c. B-cells
d. natural killer cells - CORRECT ANSWER c. B-cells
is has been hypothesized that chloroplasts originated from photosynthetic cyanobacteria that became symbiotic inside a host cell. which of the following observations provides the strongest evidence for this suggestion?
a. microscopically, chloroplasts appear similar to cyanobacteria
b. chloroplast DNA shows clear similarities to cyanobacterial DNA
c. both chloroplasts and cyanobacteria are green and perform photosynthesis
d. photosynthetic cyanobacteria and fungi form a mutualistic association in lichen - CORRECT ANSWER b. chloroplast DNA shows clear similarities to cyanobacterial DNA
which of the following describes the function of the ribosome in a living cell?
a. production of ATP molecules from energy in nutrient molecules
b. disposal and recycling of damaged or unneeded cell parts
c. use of genetic information to build specific protein molecules
d. regulation of molecules entering and leaving the cell - CORRECT ANSWER c. use of genetic information to build specific protein molecules
which of the following connects bones to muscle?
a. ligaments
b. tendons
c. synovium
d. suture - CORRECT ANSWER b. tendons
which of the following glands is found on top of the kidneys?
a. thyroid
b. pituitary
c. adrenal
d. pancreas - CORRECT ANSWER c. adrenal
which of the following results from the release of the neurotransmitter dopamine in the nerve synapse?
a. the presynaptic neuron fires an action potential
b. dopamine binds to receptor proteins on the membrane of the post synaptic cell
c. dopamine enters the cytoplasm of the postsynaptic cell
d. dopamine causes the post synaptic nerve cell to contract - CORRECT ANSWER b. dopamine binds to receptor proteins on the membrane of the post synaptic cell [Show Less]