Question 1

Which of the following muscles is primarily responsible for closing the jaw during mastication?

Accepted Answer

Masseter

Question 2

A patient presents with difficulty elevating their hyoid bone and larynx. Which group of muscles is most likely affected?

Accepted Answer

Suprahyoid muscles

Question 3

Which muscle group is responsible for the side-to-side movement of the mandible during chewing?

Accepted Answer

Medial and lateral pterygoids

Question 4

During inhalation, the diaphragm contracts and lowers, increasing the volume of the thoracic cavity. Which equation best describes the relationship between pressure and volume in this scenario?

Accepted Answer

$P_1V_1 = P_2V_2$

Question 5

Which of the following muscles is NOT part of the erector spinae group?

Accepted Answer

Transversus abdominis

Question 6

A patient has difficulty elevating their soft palate, resulting in nasal regurgitation during swallowing. Which muscle is most likely impaired?

Accepted Answer

Levator veli palatini

Question 7

Which muscle is responsible for lateral flexion and rotation of the neck when acting independently?

Accepted Answer

Sternocleidomastoid

Question 8

Which of the following is a function of the external intercostal muscles?

Accepted Answer

Elevate the ribs during inhalation

Question 9

Which muscle group is primarily responsible for compressing the abdomen?

Accepted Answer

Transversus abdominis

Question 10

A patient is unable to move their eye laterally. Which muscle is most likely paralyzed?

Accepted Answer

Lateral rectus

Question 11

Which of the following muscles is involved in both protracting and retracting the tongue?

Accepted Answer

Genioglossus

Question 12

Which muscle group forms the posterior wall of the throat and propels food into the esophagus?

Accepted Answer

Pharyngeal constrictors

Question 13

Which of the following is a deep intrinsic muscle of the vertebral column?

Accepted Answer

Transversospinales

Question 14

Which muscle is responsible for depressing the mandible (opening the jaw)?

Accepted Answer

Lateral pterygoid

Question 15

Which of the following muscles is most involved in flexing the vertebral column and depressing the ribs?

Accepted Answer

Rectus abdominis

Question 16

Which muscle group is responsible for elevating the ribs during forced inhalation?

Accepted Answer

Scalene muscles

Question 17

Which of the following is NOT a function of the diaphragm?

Accepted Answer

Compressing the abdomen

Question 18

Which muscle is most likely to be involved if a patient cannot rotate their head to the left or right?

Accepted Answer

Sternocleidomastoid

Question 19

Which of the following muscles is located most laterally in the erector spinae group?

Accepted Answer

Iliocostalis

Question 20

Which muscle is responsible for compressing the abdomen and laterally flexing the torso?

Accepted Answer

External oblique

Axial Musculature: Structure and Function in the Muscular System

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