Question 1

Which connective tissue sheath surrounds individual muscle fibers in a skeletal muscle?

Accepted Answer

Endomysium

Question 2

A muscle that opposes or reverses a particular movement is called a(n):

Accepted Answer

Antagonist

Question 3

Which of the following best describes the action of the sternocleidomastoid muscle when both sides contract simultaneously?

Accepted Answer

Flexion of the head

Question 4

Which muscle is the prime mover of arm abduction at the shoulder joint?

Accepted Answer

Deltoid

Question 5

The fascicle arrangement in the deltoid muscle is best described as:

Accepted Answer

Multipennate

Question 6

Which muscle is responsible for closing the jaw and is the prime mover of jaw closure?

Accepted Answer

Masseter

Question 7

A muscle that helps the prime mover by reducing undesirable or unnecessary movement is called a(n):

Accepted Answer

Synergist

Question 8

Which of the following muscles is NOT part of the rotator cuff?

Accepted Answer

Teres major

Question 9

The diaphragm is the prime mover of inspiration. What happens to the diaphragm during inspiration?

Accepted Answer

It contracts and flattens, increasing thoracic volume

Question 10

Which muscle is the prime mover of dorsiflexion at the ankle?

Accepted Answer

Tibialis anterior

Question 11

Which of the following best describes the function of the pelvic diaphragm?

Accepted Answer

Supports pelvic organs and resists increased intraabdominal pressure

Question 12

Which muscle is responsible for the 'smiling' facial expression by raising the lateral corners of the mouth?

Accepted Answer

Zygomaticus major

Question 13

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

Accepted Answer

Quadriceps femoris

Question 14

Which muscle is the prime mover of forearm extension at the elbow joint?

Accepted Answer

Triceps brachii

Question 15

Which of the following muscles is responsible for plantar flexion of the foot when the knee is extended?

Accepted Answer

Gastrocnemius

Question 16

Which of the following best describes the action of the external oblique muscles?

Accepted Answer

Compresses abdominal contents and flexes vertebral column

Question 17

A muscle named 'flexor carpi radialis' most likely:

Accepted Answer

Flexes the wrist and is located on the radial side

Question 18

Which of the following statements about muscle attachments is correct?

Accepted Answer

Most muscle attachments are indirect, involving tendons or aponeuroses

Question 19

Which muscle is the prime mover of tongue protrusion and helps anchor the tongue to prevent airway obstruction?

Accepted Answer

Genioglossus

Question 20

A patient presents with difficulty abducting their thigh and maintaining pelvic stability during walking. Which muscle is most likely affected?

Accepted Answer

Gluteus medius

Anatomy of the Muscular System: Structure, Function, and Major Muscles

Study Guide - Practice Questions