ACSM-EP Musculoskeletal Anatomy 4

Question 1

During a squat, the eccentric phase primarily loads which muscle group?

Accepted Answer

Quadriceps and gluteus maximus

Answer

During the eccentric (lowering) phase of a squat, the quadriceps and gluteus maximus lengthen under load to control knee and hip flexion.

Question 2

The carpal tunnel is bounded superiorly by the flexor retinaculum and contains which nerve?

Accepted Answer

Median nerve

Answer

The carpal tunnel contains the median nerve and the flexor tendons; compression of the median nerve causes carpal tunnel syndrome.

Question 3

Which muscle group is primarily responsible for scapular upward rotation during overhead pressing?

Accepted Answer

Serratus anterior and upper/lower trapezius

Answer

Scapular upward rotation is a force couple produced by the serratus anterior and the upper and lower trapezius, essential for full overhead mobility.

Question 4

The lateral longitudinal arch of the foot is supported primarily by which bone?

Accepted Answer

Cuboid

Answer

The lateral longitudinal arch runs from the calcaneus to the fifth metatarsal and is supported primarily by the cuboid bone.

Question 5

Which type of muscle fiber has the highest oxidative capacity and is most fatigue-resistant?

Accepted Answer

Type I

Answer

Type I (slow-twitch) fibers have the highest oxidative capacity, greatest mitochondrial density, and are the most fatigue-resistant, making them ideal for endurance activities.

ACSM Practice Test

ACSM Practice Test

ACSM-EP Musculoskeletal Anatomy 4