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16. Which of the following is INCORRECT about cardiovascular system? a) Antidiuretic hormone (vasopressin) stimulates water reabsorption from kidneys b) High oxygen in the tissues cause vasodilation which increases blood flow c) Renin-angiotension-aldosterone system is activated to compensate when blood pressure drops d) Sympathoadrenal activation causes increased cardiac output and resistance in periphery and viscera e) Endothelium produces nitric oxide that promote vasodilation 17. Which of the following is INCORRECT about cardiovascular system? a) During exercise, blood flow is shunted from periphery and visceral to active skeletal muscles b) Cerebral circulation gets about 15% of total resting cardiac output c) Blood pressure is controlled mainly by heart rate, stroke volume, and peripheral resistance d) When blood pressure rises, baroreceptor reflex is activated to compensate e) Sympathoadrenal activity raises blood pressure via arteriole vasoconstriction 18. Which of the following is INCORRECT about skeletal muscles and and their functions? a) The myosin head functions as a myosin ATPase b) in relaxed muscle, tropomyosin blocks binding sites on actin (c) A decrease in cytosolic calcium concentration Initiates relaxation d) Na+ influx to muscle cell produces end-plate potential e) Action potential that proceeds along the T-tubule opens the sodium channel on the T-tubule 19. Which of the following is INCORRECT about skeletal muscles and and their functions? a) In isotonic contractions, force of contraction remains constant throughout the shortening process b) Slow-twitch muscle fibers (type 1) have few mitochondria c) Strength of muscle contraction influenced by thickness of each muscle fiber d) Most energy is derived from aerobic respiration of fatty acids during light exercise e) Glucose supplies 2/3 of the energy for muscles during heavy exercise 20. Which of the following is INCORRECT about skeletal muscles and and their functions? a) Slow-twitch muscle fibers (type 1) have high oxidative capacity for aerobic respiration b) Sustained muscle contraction fatigue is due to an accumulation of ECF K+ ions c) Fast-twitch (type IIX) have rich capillary supply d) During moderate exercise fatigue occurs when slow-twitch fibers deplete their glycogen reserve e) intrafusal fibers detects the change in muscle length and tension in the muscle

          16. Which of the following is INCORRECT about cardiovascular system?

a) Antidiuretic hormone (vasopressin) stimulates water reabsorption from kidneys

b) High oxygen in the tissues cause vasodilation which increases blood flow

c) Renin-angiotension-aldosterone system is activated to compensate when blood pressure drops 

d) Sympathoadrenal activation causes increased cardiac output and resistance in periphery and viscera

e) Endothelium produces nitric oxide that promote vasodilation

17. Which of the following is INCORRECT about cardiovascular system?

a) During exercise, blood flow is shunted from periphery and visceral to active skeletal muscles

b) Cerebral circulation gets about 15% of total resting cardiac output

c) Blood pressure is controlled mainly by heart rate, stroke volume, and peripheral resistance

d) When blood pressure rises, baroreceptor reflex is activated to compensate 

e) Sympathoadrenal activity raises blood pressure via arteriole vasoconstriction

18. Which of the following is INCORRECT about skeletal muscles and and their functions?

a) The myosin head functions as a myosin ATPase

b) in relaxed muscle, tropomyosin blocks binding sites on actin

(c) A decrease in cytosolic calcium concentration Initiates relaxation

d) Na+ influx to muscle cell produces end-plate potential

e) Action potential that proceeds along the T-tubule opens the sodium channel on the T-tubule

19. Which of the following is INCORRECT about skeletal muscles and and their functions?

a) In isotonic contractions, force of contraction remains constant throughout the shortening process

b) Slow-twitch muscle fibers (type 1) have few mitochondria

c) Strength of muscle contraction influenced by thickness of each muscle fiber

d) Most energy is derived from aerobic respiration of fatty acids during light exercise 

e) Glucose supplies 2/3 of the energy for muscles during heavy exercise

20. Which of the following is INCORRECT about skeletal muscles and and their functions?

a) Slow-twitch muscle fibers (type 1) have high oxidative capacity for aerobic respiration 

b) Sustained muscle contraction fatigue is due to an accumulation of ECF K+ ions

c) Fast-twitch (type IIX) have rich capillary supply 

d) During moderate exercise fatigue occurs when slow-twitch fibers deplete their glycogen reserve 

e) intrafusal fibers detects the change in muscle length and tension in the muscle

Added by Afnan A.

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