Gym Trainer Anatomy & Physiology 2 — Questions and Answers
Question 1: What happens to heart rate and stroke volume during moderate-intensity aerobic exercise?
- Both increase (Correct answer)
- Heart rate increases; stroke volume decreases
- Both decrease
- Heart rate decreases; stroke volume increases
Correct answer: Both increase
During aerobic exercise, both heart rate and stroke volume increase to deliver more oxygen to working muscles.
Question 2: Which type of muscle fiber has the highest oxidative capacity and fatigue resistance?
- Type I (slow-twitch) (Correct answer)
- Type IIx (fast-twitch)
- Type IIa (intermediate)
- Type IIb
Correct answer: Type I (slow-twitch)
Type I (slow-twitch) fibers have the highest mitochondrial density and are most resistant to fatigue.
Question 3: The hamstrings group does NOT include which muscle?
- Gracilis (Correct answer)
- Biceps femoris
- Semitendinosus
- Semimembranosus
Correct answer: Gracilis
The gracilis is an adductor muscle of the inner thigh, not part of the hamstring group.
Question 4: What is the primary role of the core musculature during heavy compound lifts?
- Spinal stabilization and force transfer (Correct answer)
- Generating primary movement force
- Increasing range of motion
- Reducing muscle activation in the extremities
Correct answer: Spinal stabilization and force transfer
The core acts as a rigid cylinder to stabilize the spine and transfer force between the upper and lower body.
Question 5: Which anatomical plane divides the body into left and right halves?
- Sagittal plane (Correct answer)
- Frontal plane
- Transverse plane
- Coronal plane
Correct answer: Sagittal plane
The sagittal plane divides the body into left and right portions and includes flexion/extension movements.
Question 6: During prolonged exercise, what is the primary fuel source after glycogen stores are depleted?
- Fat (free fatty acids) (Correct answer)
- Protein
- Creatine phosphate
- Ketone bodies
Correct answer: Fat (free fatty acids)
When glycogen is exhausted, the body increasingly relies on free fatty acids from adipose tissue as fuel.
Gym Trainer Anatomy & Physiology 2
What happens to heart rate and stroke volume during moderate-intensity aerobic exercise?