CFP Exercise Science & Physiology

Question 1

What is the primary energy system used during short bursts of intense exercise, such as sprinting?

Accepted Answer

Phosphagen system

Answer

During short bursts of intense exercise, such as sprinting or weightlifting, the phosphagen system is the primary energy system utilized. This system rapidly produces adenosine triphosphate (ATP) by breaking down phosphocreatine stored in the muscles. It provides immediate energy for activities lasting up to about 10-15 seconds before other systems take over.

Question 2

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

Accepted Answer

Answer

The primary function of the cardiovascular system during exercise is to efficiently deliver oxygen and essential nutrients to working muscles. Simultaneously, it removes metabolic waste products, such as carbon dioxide and lactic acid, from the muscles. This ensures muscles have the necessary resources to sustain activity and prevents the buildup of fatigue-inducing byproducts.

Question 3

What is the role of mitochondria in muscle cells during exercise?

Accepted Answer

Answer

Mitochondria are often called the 'powerhouses' of the cell, and in muscle cells during exercise, their role is to produce ATP (adenosine triphosphate) for energy. They do this primarily through aerobic processes, utilizing oxygen to break down carbohydrates and fats. This sustained ATP production is crucial for endurance activities and prolonged muscle contraction.

Question 4

Which of the following best describes muscle hypertrophy?

Accepted Answer

Answer

Muscle hypertrophy describes an increase in muscle size, specifically due to an increase in the volume of individual muscle fibers. This growth is typically a result of resistance training, which causes microscopic damage to muscle fibers, prompting repair and growth. It leads to greater muscle strength and overall mass.

Question 5

What is the effect of aerobic exercise on the cardiovascular system?

Accepted Answer

Answer

Aerobic exercise has several beneficial effects on the cardiovascular system. It decreases the resting heart rate, indicating a more efficient heart that pumps more blood with each beat. It also increases the efficiency of oxygen delivery to muscles and improves overall cardiovascular endurance, strengthening the heart muscle over time.

(CFP) Certified Fitness Professional Practice Test

(CFP) Certified Fitness Professional Practice Test

CFP Exercise Science & Physiology