CPSS Foundations of Exercise Science 4

Question 1

Which bone remodeling cell is responsible for bone resorption?

Accepted Answer

Osteoclast

Answer

Osteoclasts are large, multinucleated cells that break down bone matrix by secreting acids and proteolytic enzymes during remodeling.

Question 2

During high-intensity interval training, the primary reason for reduced power output in later intervals is:

Accepted Answer

Accumulation of inorganic phosphate and hydrogen ions impairing cross-bridge cycling

Answer

Fatigue during HIIT is largely attributed to accumulation of inorganic phosphate (Pi) and H+ ions, which impair myosin ATPase activity and calcium release.

Question 3

The Wingate anaerobic test measures peak and mean power using which mode of exercise?

Accepted Answer

Stationary cycle ergometer sprint against a fixed resistance

Answer

The Wingate test is a 30-second all-out cycle ergometer sprint with a standardized resistance (typically 7.5% body mass) used to assess anaerobic peak and mean power.

Question 4

Which of the following best describes Type IIa muscle fibers compared to Type IIx?

Accepted Answer

Type IIa have higher oxidative capacity and are more fatigue resistant

Answer

Type IIa fibers are fast-twitch but have moderate oxidative capacity, making them more fatigue-resistant than Type IIx (pure fast-twitch, glycolytic) fibers.

Question 5

An athlete's VO2max is best described as:

Accepted Answer

The maximum rate at which the body can consume oxygen during incremental exercise

Answer

VO2max is the highest rate of oxygen uptake achievable during maximal aerobic exercise and represents the ceiling of the aerobic energy system.

CPSS - Certified Performance and Sport Scientist Practice Test

CPSS - Certified Performance and Sport Scientist Practice Test

CPSS Foundations of Exercise Science 4