Question 1

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

Accepted Answer

Endomysium

Question 2

A muscle that assists the prime mover by reducing unnecessary movement is called a:

Accepted Answer

Synergist

Question 3

Which of the following best describes the arrangement of fascicles in the deltoid muscle?

Accepted Answer

Multipennate

Question 4

The biceps brachii is an example of a muscle with which type of attachment to bone?

Accepted Answer

Indirect attachment via a tendon

Question 5

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

Accepted Answer

Deltoid

Question 6

A patient presents with difficulty elevating the scapula. Which muscle is most likely weakened?

Accepted Answer

Levator scapulae

Question 7

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

Accepted Answer

Masseter

Question 8

During inspiration, which muscle is the prime mover that flattens to increase thoracic volume?

Accepted Answer

Diaphragm

Question 9

Which muscle group is the primary extensor of the vertebral column and helps maintain posture?

Accepted Answer

Erector spinae

Question 10

A muscle named 'flexor carpi ulnaris' would most likely:

Accepted Answer

Flex the wrist and adduct the hand

Question 11

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

Accepted Answer

Tibialis anterior

Question 12

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

Accepted Answer

Gastrocnemius

Question 13

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

Accepted Answer

Teres major

Question 14

A muscle that crosses the anterior side of a joint typically produces which movement?

Accepted Answer

Flexion

Question 15

Which muscle is the main adductor of the thigh and is especially active when riding a horse?

Accepted Answer

Adductor magnus

Question 16

Which muscle is the prime mover of elbow extension?

Accepted Answer

Triceps brachii

Question 17

Which muscle is primarily responsible for the action of smiling?

Accepted Answer

Zygomaticus major

Question 18

Which muscle is the main flexor of the hip joint?

Accepted Answer

Iliopsoas

Question 19

Which muscle is responsible for abducting and medially rotating the thigh, and is a common site for intramuscular injections?

Accepted Answer

Gluteus medius

Question 20

Which muscle is the prime mover for extension of the knee?

Accepted Answer

Rectus femoris

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

Study Guide - Practice Questions