CPSS Foundational Scientific Disciplines 2

Question 1

Which muscle fiber type relies predominantly on oxidative phosphorylation for ATP production during prolonged endurance exercise?

Accepted Answer

Type I fibers

Answer

Type I (slow-twitch) fibers have high mitochondrial density and rely primarily on oxidative phosphorylation, making them fatigue-resistant during endurance exercise.

Question 2

In biomechanics, the moment of inertia describes an object's resistance to:

Accepted Answer

Rotational acceleration

Answer

Moment of inertia quantifies how difficult it is to change an object's rotational motion, analogous to mass in linear mechanics.

Question 3

Which neurotransmitter is primarily responsible for excitation at the neuromuscular junction?

Accepted Answer

Acetylcholine

Answer

Acetylcholine is released by motor neurons at the neuromuscular junction, binding nicotinic receptors to trigger muscle fiber depolarization.

Question 4

The Fick equation for maximal oxygen uptake (VO2max) is best expressed as:

Accepted Answer

VO2max = HR × SV × (CaO2 − CvO2)

Answer

The Fick equation states VO2 = cardiac output × arteriovenous oxygen difference (CaO2 − CvO2), where HR × SV equals cardiac output.

Question 5

Which statistical measure is most appropriate for describing the central tendency of a highly skewed distribution of recovery times?

Accepted Answer

Median

Answer

The median is resistant to extreme values and better represents central tendency when data are skewed, unlike the mean which is pulled toward outliers.

CPSS - Certified Performance and Sport Scientist Practice Test

CPSS - Certified Performance and Sport Scientist Practice Test

CPSS Foundational Scientific Disciplines 2