Question 1

Which of the following muscles is NOT part of the quadriceps group?

Accepted Answer

Biceps femoris

Question 2

During knee flexion, which muscle group is primarily responsible for this movement?

Accepted Answer

Hamstrings

Question 3

Which of the following best describes the function of the erector spinae muscle group?

Accepted Answer

Spine extension and posture

Question 4

A patient is unable to abduct their thigh. Which muscle is most likely NOT functioning properly?

Accepted Answer

Gluteus medius

Question 5

Which of the following muscles is responsible for plantar flexion of the foot?

Accepted Answer

Gastrocnemius

Question 6

Which structure surrounds an individual muscle fiber?

Accepted Answer

Endomysium

Question 7

What is the main function of the rotator cuff muscles?

Accepted Answer

Shoulder stabilization

Question 8

Which of the following correctly matches the muscle to its primary action?

Accepted Answer

Gluteus maximus – Hip/Thigh Extension

Question 9

During muscle contraction, which sarcomere region remains the same width?

Accepted Answer

A-band

Question 10

Which of the following is the correct order of connective tissue layers from outermost to innermost in a skeletal muscle?

Accepted Answer

Epimysium, Perimysium, Endomysium

Question 11

A soccer player suffers a tear in the muscle responsible for knee extension. Which muscle is most likely injured?

Accepted Answer

Rectus femoris

Question 12

Which of the following muscles is NOT involved in hip/thigh medial rotation?

Accepted Answer

Piriformis

Question 13

Which muscle is primarily responsible for lateral rotation of the shoulder?

Accepted Answer

Infraspinatus

Question 14

If the Z-discs move closer together during contraction, what happens to the sarcomere length?

Accepted Answer

It decreases

Question 15

Which of the following best describes the action of the superior oblique muscle of the eye?

Accepted Answer

Rotates eyeball inferiorly and laterally

Question 16

A patient presents with difficulty plantarflexing the foot. Which muscle is LEAST likely to be involved?

Accepted Answer

Tibialis anterior

Question 17

Which of the following statements about the sarcomere is TRUE?

Accepted Answer

The H-zone contains only thick myosin filaments

Question 18

Which muscle is a weak abductor of the hip/thigh but also assists in hip flexion and lateral rotation?

Accepted Answer

Sartorius

Question 19

Which of the following muscles is NOT part of the triceps surae group?

Accepted Answer

Plantaris

Question 20

A patient has trouble retracting their scapula. Which muscle is most likely NOT functioning properly?

Accepted Answer

Serratus anterior

Skeletal Muscle Groups, Structure, and Sarcomere Organization

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