Question 1

Which connective tissue layer directly surrounds individual skeletal muscle fibers?

Accepted Answer

Endomysium

Question 2

A muscle that is broad at one end and tapers to a single tendon is best described as which muscle shape?

Accepted Answer

Convergent

Question 3

Which of the following best describes the role of a fixator muscle during movement?

Accepted Answer

It holds a bone in place to make movement more efficient.

Question 4

During elbow flexion, which muscle acts as the agonist?

Accepted Answer

Brachialis

Question 5

Which lever class is most common in the human body and is exemplified by the biceps brachii flexing the forearm?

Accepted Answer

Third-class lever

Question 6

A patient is unable to smile or whistle properly. Which muscle is most likely affected?

Accepted Answer

Zygomaticus major

Question 7

Which muscle is the primary agonist for arm abduction at the shoulder joint?

Accepted Answer

Deltoid (central portion)

Question 8

Which muscle group is responsible for extending the leg at the knee joint?

Accepted Answer

Quadriceps femoris group

Question 9

A person is unable to dorsiflex their foot after an injury. Which muscle is most likely damaged?

Accepted Answer

Tibialis anterior

Question 10

Which muscle is primarily responsible for forced expiration, such as during a cough?

Accepted Answer

Internal intercostals

Question 11

Which of the following muscles is NOT part of the rotator cuff?

Accepted Answer

Teres major

Question 12

If the origin of a muscle is on the scapula and the insertion is on the radius, which bone will move during contraction?

Accepted Answer

Radius

Question 13

Which muscle assists with both flexion and lateral rotation of the thigh, as well as flexion of the leg?

Accepted Answer

Sartorius

Question 14

Which muscle is a powerful extensor of the thigh and also abducts and laterally rotates the thigh?

Accepted Answer

Gluteus maximus

Question 15

Which muscle is the most powerful supinator of the forearm?

Accepted Answer

Biceps brachii

Question 16

A muscle that encircles an opening and closes it when contracted is best described as which muscle shape?

Accepted Answer

Circular

Question 17

Which of the following is a function of the transversus abdominis muscle?

Accepted Answer

Compresses the abdominal cavity

Question 18

Which muscle group is responsible for adducting the thigh?

Accepted Answer

Adductor group

Question 19

Which muscle is a powerful protractor of the scapula and rotates it superiorly?

Accepted Answer

Serratus anterior

Question 20

Which of the following best describes the action of the sternocleidomastoid muscle when both sides contract together?

Accepted Answer

Flexes the head

The Muscular System: Structure, Function, and Major Muscles

Study Guide - Practice Questions