ACSM Exercise Science 4

Question 1

Which hormone is primarily responsible for mobilizing free fatty acids from adipose tissue during prolonged aerobic exercise?

Accepted Answer

Epinephrine

Answer

Epinephrine activates hormone-sensitive lipase in adipose tissue, stimulating lipolysis and releasing free fatty acids into the bloodstream during exercise.

Question 2

What is the ventilatory threshold and how does it relate to exercise intensity?

Accepted Answer

The intensity where ventilation increases disproportionately to VO2 due to CO2 buffering

Answer

The ventilatory threshold represents the exercise intensity at which CO2 production from bicarbonate buffering of lactate drives a nonlinear increase in ventilation.

Question 3

Which of the following adaptations occurs in skeletal muscle mitochondria with long-term aerobic training?

Accepted Answer

Increased mitochondrial density and oxidative enzyme activity

Answer

Chronic aerobic training increases mitochondrial biogenesis, elevating both the number and size of mitochondria and enhancing oxidative enzyme activity.

Question 4

What is the SAID principle in exercise science?

Accepted Answer

Specific Adaptations to Imposed Demands

Answer

SAID stands for Specific Adaptations to Imposed Demands, meaning the body adapts specifically to the type of stress placed upon it.

Question 5

During submaximal exercise in a hot environment, which cardiovascular adjustment helps maintain core temperature?

Accepted Answer

Cutaneous vasodilation redirecting blood to the skin

Answer

Cutaneous vasodilation shunts blood to the skin to facilitate heat dissipation via radiation and convection, which competes with muscle blood flow demands.

ACSM Practice Test

ACSM Practice Test

ACSM Exercise Science 4