BHK Exercise Physiology 2

Question 1

The Fick equation states that VO2 = cardiac output × which other variable?

Accepted Answer

Arteriovenous oxygen difference (a-vO2 diff)

Answer

Heart rate

Answer

Tidal volume

Answer

Respiratory rate

Question 2

Which adaptation is NOT typically associated with chronic endurance training?

Accepted Answer

Increased fast-twitch fiber proportion

Answer

Increased resting stroke volume

Answer

Cardiac hypertrophy (eccentric)

Answer

Lower resting heart rate

Question 3

During prolonged moderate-intensity exercise, which substrate becomes increasingly important as glycogen stores decline?

Accepted Answer

Fat (free fatty acids)

Answer

Protein

Answer

Creatine phosphate

Answer

Lactate from red blood cells

Question 4

What is the primary cause of the increase in core body temperature during exercise?

Accepted Answer

Metabolic heat production by contracting muscles

Answer

Decreased sweating rate

Answer

Increased basal metabolic rate only

Answer

Reduced blood flow to the skin

Question 5

Which component of energy expenditure is the largest contributor to total daily energy expenditure in sedentary individuals?

Accepted Answer

Resting metabolic rate

Answer

Thermic effect of food

Answer

Exercise activity thermogenesis

Answer

Non-exercise activity thermogenesis

Question 6

Excess post-exercise oxygen consumption (EPOC) is primarily driven by which process?

Accepted Answer

Replenishment of ATP-PCr stores and clearance of metabolic by-products

Answer

Increased glycolysis during recovery

Answer

Reduced ventilation post-exercise

Answer

Depletion of intramuscular triglycerides