Ace Group Fitness Test Exercise Science Fundamentals 2

Question 1

Which energy system is the PRIMARY fuel source during the first 10 seconds of a maximal sprint?

Accepted Answer

Phosphocreatine (ATP-PC) system

Answer

The phosphocreatine system provides immediate ATP for high-intensity efforts lasting up to ~10 seconds without requiring oxygen.

Question 2

What does the term 'sliding filament theory' describe?

Accepted Answer

How actin and myosin filaments overlap to produce muscle contraction

Answer

The sliding filament theory explains that actin and myosin filaments slide past each other, shortening the sarcomere and generating force.

Question 3

Which of the following BEST defines 'stroke volume' in cardiovascular physiology?

Accepted Answer

Amount of blood ejected by the left ventricle per beat

Answer

Stroke volume is the volume of blood pumped out of the left ventricle with each heartbeat, typically 70 mL at rest.

Question 4

A participant's muscle fiber predominantly contains Type I (slow-twitch) fibers. Which activity would BEST match this profile?

Accepted Answer

45-minute cycle endurance ride

Answer

Type I fibers are highly oxidative and fatigue-resistant, making them ideal for prolonged, moderate-intensity aerobic activities.

Question 5

Which hormone is primarily responsible for regulating blood glucose levels during prolonged aerobic exercise?

Accepted Answer

Glucagon

Answer

Glucagon stimulates glycogenolysis and gluconeogenesis in the liver to maintain blood glucose when levels drop during sustained exercise.

Ace Group Fitness Test Practice Test