Which of the following is a characteristic of the human organism?
A. Autotrophic with a genome stored in DNA
B. Heterotrophic with a genome stored in
... [Show More] DNA
C. Autotrophic with a genome stored in DNA
D.Heterotrophic with a genome stored in RNA - CORRECT ANSWER B.Heterotrophic with a
genome stored in DNA
Humans consume rather than manufacture nutrient molecules (heterotrophic), and human genes
are encoded in DNA
Which of the following cell types is responsible for the production of soluble antibodies?
A. Cytotoxic T-Cell
B. macrophage Cell
C. Helper T-cell
D. B-Cell - CORRECT ANSWER D. B-cell
The production of antibodies by B-cells is part of the humoral response to antigens.
Cytotoxic T-cells destroy pathogens and infected cells.
Macropahges ingest and digest both non-self and dead cells.
Helper T-clls help cytotoxic T-cells and other immune cells.
A person is suddenly frightened. Which of the following reactions occurs next?
A. liver cells absorb glucose from the blood stream.
B. Blood vessel supplying skeletal muscles constrict.
C. Blood Vessels supplying the intestines dilate.
D. Liver cells release glucose into the blood stream. - CORRECT ANSWER D. Liver cells
release glucose into the blood stream.
Epinephrine causes liver cells to break down glycogen, which causes an increase in sugar in the
blood stream.
Unlike skeletal muscle, cardiac muscle is highly resistant to lactate-mediated fatigue because
cardiac muscle:
A. uses aerobic respiration in mitochondria for energy
B. operates with electrical energy supplied by the sinoatrial (SA) node
C. primarily metabolizes glucose using the fermentation pathway
D. does not need oxygen for the production of energy - CORRECT ANSWER A. uses aerobic
respiration in mitochondria for energy
Aerobic respiration (oxidative respiration) is almost exclusively used by the heart. The
byproducts of this type of respiration are water and carbon dioxide, not lactate.
The SA node, also known as the pacemaker, produces electrical impulses for heart contraction.
The lactose-producing fermentation pathway operates during oxygen deprivation in the skeletal
muscle.
The heart is highly sensitive to oxygen deprivation, and requires a steady oxygen supply for ATP
production by oxidative phosphorylation during aerobic respiration.
Ca+H2SO4
Which of the following statements correctly describes the product of the reaction above?
A. Calcium sulfate
B. Hydrogen sulfide
C. Calcium sulfide
D. Hydrogen sulfate - CORRECT ANSWER A. calcium Sulfate
Calcium and sulfuric acid react to produce calcium sulfate and hydrogen gas
On an imaginary planet called Alpha Vega, purple eyes (F) are dominant over pink eyes (f).
Which one of the following combinations will produce only offspring with pink eyes?
A. Ff x ff
B. Ff x Ff
C. FF x ff
D. ff x ff - CORRECT ANSWER D. ff x ff
Since there is no F, all of the offspring will have pink eyes.
A defining characteristic of a scientific hypothesis is that it is
A. Testable
B. Unexpected
C. Correct
D. Predictable - CORRECT ANSWER A. Testable
A testable and falsifiable hypothesis is the hallmark of scientific investigation. Experiments can
only be used to accept or discard hypotheses.
Unexpected experimental results lead to the formulation of new, different hypotheses.
A scientific hypothesis will either be supported or refuted by evidence, but it is never considered
correct or incorrect.
Only some scientific predictions are supported by evidence; other predictions are refuted by
testing.
Which of the following arteries directly supplies oxygenated blood to the reproductive system?
A.Common carotid artery
B. Gonadal artery
C. Femoral artery
D. Subclavian artery - CORRECT ANSWER B. Gonadal artery
Which of the following is the function of the lymph nodes in mammals?
A. Pump oxygen into tissue spaces
B. Store extra glucose for emergencies
C. Synthesize hemoglobin for erythrocytes
D. Filter debris from intracellular spaces - CORRECT ANSWER D. Filter debris from
intracellular spaces
-lymph nodes filter debris, lymphocytes, and pathogens from intracellular fluid
-oxygen diffuses into tissues from capillaries of the circulatory system
-glucose is stored as glycogen in the liver and muscles of mammals
-hemoglobin is synthesized in the red blood cells
In a population that is growing, which of the following must be true?
A. Immigrants +Births=Deaths+Emmgrants
B. Emigrants+ Deaths> Immigrants + Births
C. Immigrants + Births > Emigrants +Deaths
D. Emigrants + Immigrants= Births +Deaths - CORRECT ANSWER C. Immigrants+ Births >
Emigrants + Deaths
If immigration (people joining a population) and births are greater than emigration (people
leaving population) and deaths, then the population will grow.
Which of the following glands primarily supplies hair shafts and skin with oily secretions?
A. Eccrine gland
B. Apocrine gland
C. Sebaceous gland
D. Ceruminous gland - CORRECT ANSWER C. Sebaceous gland
Sebaceous glands produce sebum, which supplies hair shafts and skin with oily secretions.
Eccrine, or merocrine, glands are distributed across the surface of the skin and produce a dilute,
salty sweat.
Apocrine glands are usually found in groin and armpits and produce swear and scent.
Ceruminous glands produce a waxy secretion in the ear canals.
What organ is the site of blood filtration?
Kidney
Heart
Lung
Brain - CORRECT ANSWER Kidney
The kidneys filter blood
The heart pumps blood but does not filter it
The lung oxygenates blood but doesn't filter it
Some drugs can cross the blood-brain barrier, but it does not actually filter the blood
What connects two bones together?
Ligament
Tendon
Marrow
Muscle - CORRECT ANSWER Ligament
Ligaments connect bones together.
Tendons connect muscles to bones
Marrow is inside the bone and does not connect it to other bones
Muscle is not typically a connective tissue
What is one thing all cells have in common? - CORRECT ANSWER cell membrane
What is a membrane composed of? - CORRECT ANSWER phospholipids
What are transport holes? - CORRECT ANSWER proteins that help certain molecules and ions
move in and out of the cell
What are cells filled with? - CORRECT ANSWER cytoplasm [Show Less]