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

The Fick principle expresses oxygen consumption as the product of cardiac output and the a-vO2 difference across the tissues.

Question 2

Which adaptation is NOT typically associated with chronic endurance training?

Accepted Answer

Increased fast-twitch fiber proportion

Answer

Endurance training does not increase the proportion of fast-twitch fibers; it may convert Type IIx to Type IIa but not increase Type II overall.

Question 3

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

Accepted Answer

Fat (free fatty acids)

Answer

As glycogen depletes during prolonged exercise, fat oxidation (free fatty acids) progressively contributes more to energy production.

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

Approximately 75–80% of the energy released during muscle contraction is in the form of heat, raising core temperature.

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

Resting metabolic rate (RMR) accounts for approximately 60–75% of total daily energy expenditure in sedentary people.

BHK - Bachelor of Kinesiology Practice Test