Mr. White

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

• To increase muscle tension

• To deliver oxygen and nutrients to muscles

• To regulate body temperature

• To remove waste products

Answer explanation

The primary function of the cardiovascular system during exercise is to deliver oxygen and nutrients to muscles, which is essential for energy production and performance.

Which type of muscle fiber is primarily responsible for endurance activities?

• Fast-twitch (FT)

• Slow-twitch (ST)

• Intermediate

• Cardiac

Answer explanation

Slow-twitch (ST) muscle fibers are designed for endurance activities. They are more efficient at using oxygen to generate energy for prolonged, low-intensity exercise, making them ideal for endurance sports.

What is the term for the body's ability to transport and utilize oxygen?

• Anaerobic capacity

• Aerobic capacity

• Muscular endurance

• Cardiovascular endurance

Answer explanation

Aerobic capacity refers to the body's ability to transport and utilize oxygen efficiently during prolonged physical activity, making it the correct term for this physiological function.

Which hormone regulates blood sugar levels during exercise?

• Insulin

• Glucagon

• Adrenaline

• Cortisol

Answer explanation

Insulin is the hormone that helps regulate blood sugar levels, especially after meals. During exercise, insulin levels decrease to allow glucose to be available for energy, but it primarily regulates blood sugar in general.

What is the term for the resting energy expenditure?

• Basal metabolic rate (BMR)

• Thermic effect of exercise (TEE)

• Daily energy expenditure (DEE)

• Energy balance

Answer explanation

The term for resting energy expenditure is Basal Metabolic Rate (BMR). It represents the number of calories required to keep your body functioning at rest.