Question 1

Which of the following best describes the action of the deltoid muscle?

Accepted Answer

Prime mover of arm abduction when all its fibers contract simultaneously.

Question 2

A muscle that crosses on the anterior side of a joint typically produces which movement?

Accepted Answer

Flexion

Question 3

Which anatomical plane divides the body into left and right halves?

Accepted Answer

Sagittal (midsagittal) plane

Question 4

During a biceps curl, which muscle acts as the antagonist?

Accepted Answer

Triceps brachii

Question 5

Which movement is defined as decreasing the angle of a joint, such as bending the elbow?

Accepted Answer

Flexion

Question 6

If a muscle crosses the lateral side of a joint, what movement does it typically produce?

Accepted Answer

Abduction

Question 7

Which of the following is a special movement of the foot where the sole turns medially?

Accepted Answer

Inversion

Question 8

Which muscle is the prime mover for head flexion?

Accepted Answer

Sternocleidomastoid

Question 9

What is the action of the masseter muscle?

Accepted Answer

Elevates the mandible and closes the jaw

Question 10

Which term describes the movement of a limb so that it traces a cone in space?

Accepted Answer

Circumduction

Question 11

A patient is unable to blink or squint. Which muscle is most likely paralyzed?

Accepted Answer

Orbicularis oculi

Question 12

Which muscle group is the prime mover of back extension and lateral bending?

Accepted Answer

Erector spinae

Question 13

Which movement is produced by a muscle that crosses on the posterior side of a joint?

Accepted Answer

Extension

Question 14

Which of the following is an example of a fixator muscle?

Accepted Answer

A muscle that immobilizes the origin of another muscle

Question 15

Which movement is described as lifting a body part superiorly, such as shrugging the shoulders?

Accepted Answer

Elevation

Question 16

Which muscle is responsible for raising the lateral corners of the mouth (smiling)?

Accepted Answer

Zygomaticus

Question 17

A muscle named 'biceps' most likely has:

Accepted Answer

Two origins

Question 18

Which of the following best describes plantar flexion?

Accepted Answer

Downward movement of the foot, pointing the toes

Question 19

Which muscle is a synergist in forearm flexion, adding force and reducing unnecessary movement?

Accepted Answer

Brachialis

Question 20

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

Accepted Answer

Color of the muscle

Muscles: Structure, Function, and Movement in Human Anatomy

Study Guide - Practice Questions