NSCA-CPT Human Anatomy and Physiology Diagnostic 2

Question 1

Which muscle acts as the primary hip flexor during a high knee drill?

Accepted Answer

Iliopsoas

Answer

The iliopsoas is the strongest and most powerful hip flexor, responsible for the majority of hip flexion force during high-knee movements.

Question 2

Which type of muscle fiber is most fatigue-resistant and primarily recruited during low-intensity, long-duration activities?

Accepted Answer

Type I

Answer

Type I (slow-twitch) fibers have high oxidative capacity and many mitochondria, making them highly fatigue-resistant and ideal for aerobic endurance activities.

Question 3

The sinoatrial (SA) node is located in which chamber of the heart?

Accepted Answer

Right atrium

Answer

The SA node is embedded in the wall of the right atrium near the opening of the superior vena cava and initiates each cardiac cycle.

Question 4

During elbow flexion, the brachialis muscle acts on which joint structure?

Accepted Answer

Coronoid process of the ulna

Answer

The brachialis inserts on the coronoid process and tuberosity of the ulna, making it a pure elbow flexor regardless of forearm rotation.

Question 5

Which hormonal response to acute resistance exercise primarily promotes muscle protein synthesis?

Accepted Answer

Insulin-like growth factor-1 (IGF-1)

Answer

IGF-1 stimulates satellite cell activation and protein synthesis pathways, making it a key anabolic signal following resistance training.

NSCA-CPT Exam Practice Test

NSCA-CPT Exam Practice Test

NSCA-CPT Human Anatomy and Physiology Diagnostic 2