Question 1

A patient presents with difficulty chewing and moving their jaw. Which muscle is most likely affected?

Accepted Answer

Temporalis

Question 2

Which muscle is primarily responsible for elevating the mandible during mastication?

Accepted Answer

Masseter

Question 3

A soccer player suffers a blow to the lateral thigh and is unable to abduct their thigh. Which muscle is most likely injured?

Accepted Answer

Gluteus medius

Question 4

Which muscle is responsible for compressing the abdomen and rotating the trunk?

Accepted Answer

Internal/External obliques

Question 5

During a biceps curl, which muscle acts as the primary flexor of the forearm?

Accepted Answer

Biceps brachii

Question 6

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

Accepted Answer

Quadriceps femoris

Question 7

Which muscle is responsible for plantar flexion of the foot and is commonly injured in runners?

Accepted Answer

Gastrocnemius

Question 8

If a patient cannot flex their thigh at the hip, which muscle is most likely compromised?

Accepted Answer

Iliopsoas

Question 9

Which muscle is involved in both flexing the knee and extending the thigh, and is part of the hamstring group?

Accepted Answer

Biceps femoris

Question 10

A patient is unable to pucker their lips. Which muscle is most likely affected?

Accepted Answer

Orbicularis oris

Question 11

Which muscle is responsible for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 12

A patient presents with difficulty extending their fingers. Which muscle is most likely impaired?

Accepted Answer

Extensor digitorum

Question 13

Which muscle is the primary extensor of the elbow joint?

Accepted Answer

Triceps brachii

Question 14

A patient is unable to flex their wrist. Which muscle is most likely affected?

Accepted Answer

Flexor carpi radialis

Question 15

Which muscle is responsible for elevating the shoulders (shrugging)?

Accepted Answer

Trapezius

Question 16

A patient is unable to rotate their trunk. Which muscle group is most likely affected?

Accepted Answer

Internal/External obliques

Question 17

Which muscle is responsible for extending the thigh at the hip joint?

Accepted Answer

Gluteus maximus

Question 18

A patient is unable to adduct their thigh. Which muscle is most likely affected?

Accepted Answer

Adductor magnus

Question 19

Which muscle is responsible for flexing the trunk and compressing the abdomen, and is often targeted in abdominal exercises?

Accepted Answer

Rectus abdominis

Question 20

A patient is unable to extend their toes. Which muscle is most likely impaired?

Accepted Answer

Extensor digitorum

Muscle Definitions and Functions: A&P Lab Final Review

Study Guide - Practice Questions