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EXSC 463 EXERCISE PHYSIOLOGY FINAL EXAM
ALL COMPLETE 300 QUESTIONS WITH
DETAILED SOLUTIONS JUST RELEASED THIS
YEAR
EXSC 463 EXERCISE PHYSIOLOGY FINAL EXAM 300 RANDOMIZED QUESTIONS WITH ANSWER
& RATIONALES
1. 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?
A) Plateau
B) Retrogression
C) Reversal
D) Overreaching
Answer: C
The reversal principle states that detraining occurs when training is stopped or reduced, leading
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to a loss of physiological adaptations. This is distinct from retrogression which implies a gradual
decline, while reversal specifically describes the loss of training-induced improvements.
2. Which of the following athletes would perform best during an upcoming marathon?
A) Bob weighs 80 kg with VO₂max of 4.0 L/min
B) Bill weighs 75 kg with VO₂max of 3.75 L/min
C) Matt weighs 65 kg with VO₂max of 4.0 L/min and LT at 75% VO₂max
D) Micah weighs 75 kg with VO₂max of 4.8 L/min and LT at 70% VO₂max
Answer: C
Endurance performance depends not only on absolute VO₂max but also on the lactate threshold
(LT) relative to VO₂max. Matt has the highest LT percentage (75%) combined with a high relative
VO₂max (61.5 mL/kg/min), allowing him to sustain a higher percentage of his aerobic capacity
before blood lactate accumulation.
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3. The force of contraction of intact whole skeletal muscle is graded by which mechanism?
A) Changing the strength of individual action potentials
B) Recruitment of motor units of different sizes and types
C) Varying the frequency of stimulation of a single motor unit only
D) Changing the type of neurotransmitter released
Answer: B
Force gradation in skeletal muscle occurs through recruitment of additional motor units (spatial
summation) and through frequency modulation (temporal summation). The size principle
dictates that smaller motor units are recruited first, followed by larger ones as force
requirements increase.
4. In the conditions typical of skeletal muscle, how much energy is released from the hydrolysis
of 1 mole of ATP?
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A) 7.3 kcal
B) 9.0 kcal
C) 12 kcal
D) 14 kcal
Answer: C
Under physiological conditions (normal pH, temperature, and ionic concentrations), the
hydrolysis of 1 mole of ATP releases approximately 12 kcal of energy. In laboratory conditions,
this value is about 7.3 kcal, but the cellular environment yields higher energy release.
5. The enzyme that catalyzes the hydrolysis of ATP is called:
A) ATP synthase
B) ATPase
C) Creatine kinase
D) Phosphofructokinase
4
SUCCESS!
EXSC 463 EXERCISE PHYSIOLOGY FINAL EXAM
ALL COMPLETE 300 QUESTIONS WITH
DETAILED SOLUTIONS JUST RELEASED THIS
YEAR
EXSC 463 EXERCISE PHYSIOLOGY FINAL EXAM 300 RANDOMIZED QUESTIONS WITH ANSWER
& RATIONALES
1. 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?
A) Plateau
B) Retrogression
C) Reversal
D) Overreaching
Answer: C
The reversal principle states that detraining occurs when training is stopped or reduced, leading
1
SUCCESS!
,Page 2 of 222
to a loss of physiological adaptations. This is distinct from retrogression which implies a gradual
decline, while reversal specifically describes the loss of training-induced improvements.
2. Which of the following athletes would perform best during an upcoming marathon?
A) Bob weighs 80 kg with VO₂max of 4.0 L/min
B) Bill weighs 75 kg with VO₂max of 3.75 L/min
C) Matt weighs 65 kg with VO₂max of 4.0 L/min and LT at 75% VO₂max
D) Micah weighs 75 kg with VO₂max of 4.8 L/min and LT at 70% VO₂max
Answer: C
Endurance performance depends not only on absolute VO₂max but also on the lactate threshold
(LT) relative to VO₂max. Matt has the highest LT percentage (75%) combined with a high relative
VO₂max (61.5 mL/kg/min), allowing him to sustain a higher percentage of his aerobic capacity
before blood lactate accumulation.
2
SUCCESS!
,Page 3 of 222
3. The force of contraction of intact whole skeletal muscle is graded by which mechanism?
A) Changing the strength of individual action potentials
B) Recruitment of motor units of different sizes and types
C) Varying the frequency of stimulation of a single motor unit only
D) Changing the type of neurotransmitter released
Answer: B
Force gradation in skeletal muscle occurs through recruitment of additional motor units (spatial
summation) and through frequency modulation (temporal summation). The size principle
dictates that smaller motor units are recruited first, followed by larger ones as force
requirements increase.
4. In the conditions typical of skeletal muscle, how much energy is released from the hydrolysis
of 1 mole of ATP?
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A) 7.3 kcal
B) 9.0 kcal
C) 12 kcal
D) 14 kcal
Answer: C
Under physiological conditions (normal pH, temperature, and ionic concentrations), the
hydrolysis of 1 mole of ATP releases approximately 12 kcal of energy. In laboratory conditions,
this value is about 7.3 kcal, but the cellular environment yields higher energy release.
5. The enzyme that catalyzes the hydrolysis of ATP is called:
A) ATP synthase
B) ATPase
C) Creatine kinase
D) Phosphofructokinase
4
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