Question 1

Which statement best describes the relationship between the origin and insertion of a skeletal muscle during contraction?

Accepted Answer

The insertion moves toward the origin.

Question 2

A patient is unable to flex their forearm at the elbow. Which muscle is most likely impaired?

Accepted Answer

Biceps brachii

Question 3

Which of the following is NOT a criterion used in naming skeletal muscles?

Accepted Answer

Muscle color

Question 4

The muscle responsible for closing the lips, as in kissing, is the:

Accepted Answer

Orbicularis oris

Question 5

Which muscle acts as the prime mover (agonist) during elbow flexion when lifting a glass of water?

Accepted Answer

Biceps brachii

Question 6

A muscle that assists the prime mover by adding extra force or reducing undesirable movements is called a:

Accepted Answer

Synergist

Question 7

Which muscle is primarily responsible for compressing the abdominal cavity?

Accepted Answer

Transversus abdominis

Question 8

If a person cannot rotate their head to the left or right, which muscle is most likely affected?

Accepted Answer

Sternocleidomastoid

Question 9

Which muscle is the antagonist to the biceps brachii during elbow flexion?

Accepted Answer

Triceps brachii

Question 10

A patient presents with difficulty abducting their arm at the shoulder. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 11

Which muscle is responsible for plantar flexion of the foot, such as when standing on tiptoe?

Accepted Answer

Gastrocnemius

Question 12

Which of the following muscles is a rotator cuff muscle?

Accepted Answer

Teres minor

Question 13

A muscle named 'flexor carpi radialis' most likely:

Accepted Answer

Flexes the wrist on the radial side

Question 14

Which muscle is primarily responsible for chewing by elevating the mandible?

Accepted Answer

Masseter

Question 15

Which muscle is most active when you whistle?

Accepted Answer

Orbicularis oris

Question 16

Which muscle is responsible for flexion of the thigh at the hip joint?

Accepted Answer

Iliopsoas

Question 17

Which muscle is responsible for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 18

During a push-up, which muscle acts as the prime mover for flexion of the arm at the shoulder?

Accepted Answer

Pectoralis major

Question 19

Which muscle is responsible for the extension of the leg at the knee joint, such as when kicking a ball?

Accepted Answer

Rectus femoris

Question 20

Which of the following statements about muscle movement is correct?

Accepted Answer

Muscles only pull, never push.

Muscular System: Structure, Classification, and Function

Study Guide - Practice Questions