FREE NAFC Exercise Science Questions and Answers

Question 1

What is the primary function of the cardiovascular system during exercise?

Accepted Answer

To deliver oxygen and nutrients to tissues

Answer

To digest food efficiently

Answer

To eliminate waste products through sweat

Answer

To provide structural support to muscles

Question 2

Which type of muscle fiber is most resistant to fatigue and primarily used during endurance activities?

Accepted Answer

Type I (slow-twitch)

Answer

Type IIa (fast-twitch)

Answer

Type IIb (fast-twitch)

Answer

Type IIx (fast-twitch)

Question 3

What is the role of adenosine triphosphate (ATP) in muscle contraction?

Accepted Answer

It provides energy for muscle contractions

Answer

It acts as a neurotransmitter

Answer

It stores oxygen in muscles

Answer

It acts as a structural component of muscle cells

Question 4

Which component of physical fitness is primarily improved by regular aerobic exercise?

Accepted Answer

Cardiovascular endurance

Answer

Body composition

Answer

Flexibility

Answer

Muscular strength

Question 5

During resistance training, what type of muscle contraction occurs when the muscle lengthens while producing force?

Accepted Answer

Eccentric contraction

Answer

Static contraction

Answer

Concentric contraction

Answer

Isometric contraction

Question 6

Which hormone is primarily responsible for the regulation of blood glucose levels during exercise?

Accepted Answer

Glucagon

Answer

Insulin

Answer

Estrogen

Answer

Testosterone

Question 7

What is the term for the highest rate at which oxygen can be taken up and utilized during exercise?

Accepted Answer

VO2 max

Answer

Anaerobic threshold

Answer

Lactate threshold

Answer

Metabolic equivalent