Question 1

Which of the following best describes the role of a synergist muscle during a bicep curl exercise?

Accepted Answer

It assists the biceps brachii in flexing the elbow.

Question 2

A patient is unable to close their eyelids tightly after a facial injury. Which cranial nerve is most likely damaged?

Accepted Answer

Facial nerve (CN VII)

Question 3

Which muscle is the primary mover for inspiration, and what is its main action?

Accepted Answer

Diaphragm; increases thoracic cavity volume

Question 4

During a standing calf raise, which muscle acts as the primary plantar flexor?

Accepted Answer

Gastrocnemius

Question 5

A muscle named 'adductor longus' is likely named based on which of the following characteristics?

Accepted Answer

Its action and relative size

Question 6

Which of the following statements about lever systems in the human body is correct?

Accepted Answer

A power lever occurs when the load is closer to the fulcrum than the effort.

Question 7

Which fascicle arrangement allows for the greatest power generation in a muscle, and why?

Accepted Answer

Pennate, because more fibers are packed into a smaller area

Question 8

If the quadriceps femoris group is paralyzed, which movement would be most affected?

Accepted Answer

Knee extension

Question 9

Which muscle is both the largest in the body and a primary extensor of the hip?

Accepted Answer

Gluteus maximus

Question 10

A person is unable to flex their forearm at the elbow after an injury. Which muscle is most likely damaged?

Accepted Answer

Biceps brachii

Question 11

Which of the following best describes the arrangement of a 3rd class lever in the human body?

Accepted Answer

Effort – Fulcrum – Load

Question 12

Which muscle is the longest in the human body and is responsible for flexing, abducting, and laterally rotating the thigh at the hip joint?

Accepted Answer

Sartorius

Question 13

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

Accepted Answer

Triceps brachii

Question 14

Which muscle group is primarily responsible for both hip extension and knee flexion?

Accepted Answer

Hamstrings

Question 15

During chewing, which two muscles act as the prime movers of mastication?

Accepted Answer

Masseter and temporalis

Question 16

Which of the following best describes the function of a fixator muscle during movement?

Accepted Answer

It stabilizes the origin of the prime mover.

Question 17

Which muscle group is primarily responsible for dorsiflexion of the foot?

Accepted Answer

Anterior leg muscles

Question 18

A muscle named 'deltoid' is named based on which characteristic?

Accepted Answer

Its shape

Question 19

Which of the following is true regarding the movement of skeletal muscles during contraction?

Accepted Answer

The insertion moves toward the origin.

Question 20

Which of the following best describes the function of circular muscles in the body?

Accepted Answer

They close body openings as sphincters.

Ch.10-The Muscular System: Structure, Function, and Major Muscles

Study Guide - Practice Questions