Question 1

Which of the following best describes the primary action of the glenohumeral joint during a baseball pitch?

Accepted Answer

Flexion and internal rotation in the transverse plane

Question 2

A patient presents with difficulty flexing their wrist. Which muscle group is most likely compromised?

Accepted Answer

Anterior forearm flexors

Question 3

During a squat, which plane of motion is primarily involved at the hip joint?

Accepted Answer

Sagittal plane

Question 4

Which of the following muscles is NOT involved in mastication?

Accepted Answer

Orbicularis oculi

Question 5

A soccer player injures their posterior thigh. Which action is most likely impaired?

Accepted Answer

Knee flexion

Question 6

The scapulothoracic joint is classified as which type of joint?

Accepted Answer

Functional joint

Question 7

Which muscle group is primarily responsible for dorsiflexion of the ankle?

Accepted Answer

Anterior leg muscles

Question 8

A patient has difficulty opening their jaw. Which muscle is most likely affected?

Accepted Answer

Lateral pterygoid

Question 9

Which of the following actions occurs in the frontal plane?

Accepted Answer

Hip abduction

Question 10

If the extensor muscles of the forearm are paralyzed, which movement would be most affected?

Accepted Answer

Wrist extension

Question 11

Which muscle group stabilizes the spine during heavy lifting?

Accepted Answer

Core muscles

Question 12

A patient presents with inability to adduct their thigh. Which muscle group is most likely affected?

Accepted Answer

Medial thigh muscles

Question 13

Which of the following is a primary function of the intrinsic muscles of the foot?

Accepted Answer

Flexion and extension of the toes

Question 14

During chewing, which muscle elevates the mandible?

Accepted Answer

Masseter

Question 15

Which muscle group is primarily responsible for flexion of the hip?

Accepted Answer

Anterior thigh muscles

Question 16

A patient has difficulty moving their eye laterally. Which muscle is most likely affected?

Accepted Answer

Lateral rectus

Question 17

Which of the following movements is an example of rotation in the transverse plane?

Accepted Answer

Neck rotation

Question 18

A patient presents with weakness in wrist extension and finger extension. Which nerve is most likely affected?

Accepted Answer

Radial nerve

Question 19

Which equation best represents the force generated by a muscle during contraction?

Accepted Answer

$$ F = m 	imes a $$

Question 20

A patient is unable to flex their elbow. Which muscle is most likely compromised?

Accepted Answer

Biceps brachii

Skeletal Muscle Function: Actions and Planes of Motion

Study Guide - Practice Questions