Unlike skeletal muscle, *cardiac muscle* is highly resistant to Lactate-mediated fatigue because
cardiac muscle
A. uses aerobic respiration in
... [Show More] mitochondria for energy
b. Operates with electrical energy supplied by SA node
c. primarily metabolizes glucose using the fermentation pathway
d. Does not need oxygen for production of energy - answeruses 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 CO2*, Not lactate
SA Node: Pacemaker, produces electrical impulses for heart contraction
Lactose-producing pathway: operates during oxygen deprivation in the skeletal muscle
Heart is highly sensitive to *oxygen deprivation-requires steady oxygen* for ATP production
4. What is the name of a condition where the heart rate is 118 beats per minute (bpm)?
a. tachycardia
b. apnea
c. bradycardia
d. tachypnea - answera. tachycardia-faster than normal heart rate at rest.
Healthy adult heart=*60-100 BPM.*
Apnea=absent of respiration
bradycardia=*slower* than normal heart rate
Tachypnea=presence of *rapid respirations*
7. Long bones are one of the five major types of bone in the human body. All of the following bones
are long bone except
a. thighs
b. forearms
c. ankles
d. fingers - answerC. ankles
*Short bones*: cube shaped or round
Carpal bone of the wrist/ tarsal bones of the foot
Most bones in the limbs are long bone: thighs, forearms, and fingers
20. Which of the following is an example of a tissue?
a. chloroplast
b. liver
c. mammal
d. hamstring - answerChloroplast=is an example of tissue
liver is an organ, mammal is organism, Hamstring is a muscle.
29. What are substances that stimulate *adaptive immunity called*?
a. peptides
b. phagocytes
c. prions
d. platelets - answerPhagocytes are specialized *white blood cells* that kill pathogens and initiate
an immune response.
Display-the ingested pathogen to the B cells or memory cells which help the body to remember the
pathogen in the future.
31. Which of the following has the least amount of sweat glands?
a. back
b. palm
c. axilla
d. forehead - answera. back
Lower concentration in back and the leg
Sweat glands are distributed all over the body-to cool off the body.
Primarily concentrated in the axilla and perianal area.
High concentration in forehead, palms, soles, and groins
32. What type of chemical bond connects the oxygen and hydrogen atoms in a molecule of water?
a. static bond
b. aquatic bond
c. ionic bond
d. covalent bond - answerA covalent bond is one in which atoms *share valence electrons*. Within a
water molecule, one oxygen atom and two hydrogen atoms share valence electrons to yield the
H2O Structure
34. Which of the following needed for an experiment to be considered sucessful?
a. a reasonable hypothesis
b. a well-written lab report
c. data that others can reproduce
d. computer-aided statistical analysis - answerC. it must yield a data that others can reproduce.
47. Which of the following best describes the primary function of Bartholin's glands?
a. Secretes hormones that help the body respond to stress
b. Provide lubrication for vagina
c. Helps control growth and development of the body
d. stimulate the development of T cells - answerB. Bartholin's gland also known as greater
vestibular glands play a role in *female reproduction.* The bartholin's gland lie on either side of
the vaginal opening. They produce a mucoid substance, which provides *lubrication for
intercourse.*
a. adrenal medulla regulates flight-or fight response
c. Pituitary gland-produce hormones which control growth and sexual functioning
d. T cells originate in the bone marrow and *mature in the thymus*. In the thymus, T cells multiply
and differentiate into helper, regulatory, or cytotoxic T cells or become memory T cells.
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 - answerB. Sebaceous gland
Produce sebum, which supplies hair shafts with skin with oily sec [Show Less]