NSCA-CPT Exercise Physiology 4

Question 1

Which of the following BEST describes the 'oxygen deficit' at the onset of exercise?

Accepted Answer

The lag between oxygen demand and aerobic system delivery at exercise onset

Answer

Oxygen deficit is the difference between the oxygen required at exercise onset and the oxygen actually consumed before steady state is reached.

Question 2

An increase in core body temperature during exercise affects hemoglobin's oxygen-binding affinity by:

Accepted Answer

Decreasing affinity (right shift of oxyhemoglobin curve)

Answer

Elevated temperature causes a rightward shift of the oxyhemoglobin dissociation curve, reducing hemoglobin's affinity and enhancing O2 release to working muscles.

Question 3

Which enzyme is rate-limiting for the glycolytic pathway?

Accepted Answer

Phosphofructokinase (PFK)

Answer

Phosphofructokinase (PFK) is the key regulatory enzyme of glycolysis, controlling the rate of glucose metabolism.

Question 4

Which of the following best describes the concept of 'metabolic specificity' in training?

Accepted Answer

Energy systems trained must match those predominantly used in competition

Answer

Metabolic specificity means training should stress the same energy pathways (phosphagen, glycolytic, oxidative) that the target sport or activity demands.

Question 5

Peripheral vascular resistance during aerobic exercise is PRIMARILY reduced by:

Accepted Answer

Local vasodilation due to metabolic byproducts in active muscles

Answer

Metabolic byproducts (CO2, lactic acid, adenosine, heat) cause local vasodilation in active muscles, reducing peripheral resistance and increasing blood flow.

NSCA-CPT Exam Practice Test

NSCA-CPT Exam Practice Test

NSCA-CPT Exercise Physiology 4