EXSC 463 EXERCISE PHYSIOLOGY FINAL

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EXSC 463 EXERCISE PHYSIOLOGY FINAL

EXAM BYU 2025 WITH 250 EXAM QUESTIONS

AND CORRECT ANSWERS/ BYU EXSC 463 FINAL

TEST 2025 (BRAND NEW!)

Susan stopped her exercise program during the COVID-19 pandemic. The loss of physical fitness that she experienced is an example of which principle of training?

• Plateau
• Retrogression
• Reversal
• Overreaching - ANSWER-C. Reversal

Force of contraction is graded by the recruitment of motor units in which of the following types of muscle?

• Smooth muscle
• Cardiac muscle
• Skeletal muscle
• All of the above
• B and C - ANSWER-C. Skeletal Muscle

The blood shunt refers to the _____.

• increase in blood flow to the entire body during exercise
• equal increase in blood flow to all skeletal muscle during exercise
• the prioritization and redistribution of blood flow to metabolically active muscle

during exercise. - ANSWER-C. the prioritization and redistribution of blood flow to metabolically active muscle during exercise. 1 / 4

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The motor response of an organ that has dual innervation depends on _____.

• which motor neuron is turned on and which is turned off
• the net effect of stimulation of both motor neurons
• what neurotransmitters are released and to what receptors they bind -

ANSWER-B. the net effect of stimulation of both motor neurons

Sympathetic stimulation of the heart will result in _____.

• an increase in heart rate
• an increase in the force of contraction of the heart
• an increase in both heart rate and force of contraction - ANSWER-C. an

increase in both heart rate and force of contraction

The size of a neuron refers to _____.

• the number of muscle fibers it innervates
• the type of muscle fibers it innervates
• the number of terminal ends it has
• the cross-sectional area of its axon
• the size of its cell body - ANSWER-D. the cross-sectional area of its axon

Which of the following motor neurons would conduct an action potential the slowest?

• A large myelinated neuron
• A small myelinated neuron
• A large unmyelinated neuron
• A small unmyelinated neuron - ANSWER-D. a small unmyelinated neuron 2 / 4

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Outside of the spinal cord, ganglia are part of the _____.

• sympathetic motor nervous system
• parasympathetic motor nervous system
• somatic motor nervous system
• autonomic motor nervous system
• all of the above - ANSWER-D. autonomic motor nervous system

Neural stimulation always causes an excitatory response.

• True
• False - ANSWER-False

The 'size' of the motor unit _____.

• reflects the size of the motor neuron and the order of its recruitment
• the type of muscle fibers in the motor unit
• the number of muscle fibers in the motor unit
• the size of the muscle fibers in the motor unit - ANSWER-C. the number of

muscle fibers in the motor unit

Compared to resting conditions, which of the following is necessary to increase blood flow to active skeletal muscle during exercise?

• An increase in total blood flow (i.e., cardiac output).
• A decrease in venous pooling and an increase in venous return to the heart.
• The prioritization and redistribution of blood flow away from less metabolically

active tissue to the more metabolically active skeletal muscle mass. 3 / 4

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• All of the above. - ANSWER-D. All of the above

A specific neurotransmitter _____.

• will always cause the same response (excitation or inhibition) at different

locations

• can be excitatory at one location and inhibitory at another location
• will only be either excitatory or inhibitory, but never both - ANSWER-B. can be

excitatory at one location and inhibitory at another location

The autonomic nervous system has antagonistic control of _____.

• Heart rate
• force of the heart's contraction
• heart rate and force of contraction of the heart - ANSWER-A. Heart Rate

Compared to resting, during exercise, the blood shunt _____.

• increases blood flow to the entire body
• increases blood flow to all skeletal muscle
• redistributes and prioritizes blood flow based on metabolic demand
• A and B
• All of the above - ANSWER-C. Redistributes and prioritizes blood flow based

on metabolic demand

Bob is exercising at an intensity equivalent to 5 METs. Which of the following is a true statement about Bob's exercise?

• Bob is exercising at a "light" intensity.
• Bob is expending about 17.5 kcal/min.
• Bob is meeting the minimal physical activity recommendations.
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