Question 1

Which muscle is primarily responsible for flexing the forearm at the elbow joint?

Accepted Answer

Biceps brachii

Question 2

A patient presents with difficulty elevating their shoulders. Which muscle is most likely impaired?

Accepted Answer

Trapezius

Question 3

Which muscle is the primary agonist for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 4

During a sit-up, which abdominal muscle is most responsible for flexing the vertebral column?

Accepted Answer

Rectus abdominis

Question 5

Which muscle is primarily responsible for abduction of the arm at the shoulder joint?

Accepted Answer

Deltoid

Question 6

A soccer player sustains an injury to the posterior thigh. Which muscle group is most likely affected?

Accepted Answer

Hamstrings

Question 7

Which muscle is responsible for plantar flexion of the foot during activities such as jumping?

Accepted Answer

Gastrocnemius

Question 8

Damage to which muscle would most likely impair the ability to close the eyelids?

Accepted Answer

Orbicularis oculi

Question 9

Which muscle is the primary mover for extension of the forearm at the elbow?

Accepted Answer

Triceps brachii

Question 10

A patient cannot rotate their head to the opposite side against resistance. Which muscle is most likely weak?

Accepted Answer

Sternocleidomastoid

Question 11

Which muscle is primarily responsible for the movement of the eye laterally (abduction)?

Accepted Answer

Lateral rectus

Question 12

Which muscle forms the bulk of the calf and inserts into the calcaneus via the Achilles tendon?

Accepted Answer

Gastrocnemius

Question 13

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

Accepted Answer

Iliopsoas

Question 14

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

Accepted Answer

Triceps brachii

Question 15

Which muscle is most involved in compressing the abdominal contents during forced expiration?

Accepted Answer

Transversus abdominis

Question 16

A patient is unable to extend their knee. Which muscle group is most likely affected?

Accepted Answer

Quadriceps femoris

Question 17

Which muscle is primarily responsible for the adduction of the thigh?

Accepted Answer

Adductor longus

Question 18

Which muscle is most responsible for the upward rotation of the scapula during arm elevation?

Accepted Answer

Serratus anterior

Question 19

Which muscle is primarily responsible for pronation of the forearm?

Accepted Answer

Pronator teres

Question 20

Which muscle is most responsible for the extension of the thigh at the hip joint, especially during climbing stairs?

Accepted Answer

Gluteus maximus

Overview of Major Human Muscles: Structure and Function

Study Guide - Practice Questions