Question 1

Which connective tissue layer directly surrounds each individual skeletal muscle fiber?

Accepted Answer

Endomysium

Question 2

A muscle with fascicles arranged at an angle to the tendon, resembling a feather, is best described as which type?

Accepted Answer

Pennate

Question 3

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

Accepted Answer

Stabilizes the origin of the agonist to increase efficiency and prevent injury

Question 4

In a third-class lever system, which component is located in the middle?

Accepted Answer

Applied force

Question 5

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

Accepted Answer

Masseter

Question 6

A patient presents with difficulty dorsiflexing the foot after a sports injury. Which muscle is most likely affected?

Accepted Answer

Tibialis anterior

Question 7

Which of the following muscles is part of the rotator cuff group and is responsible for initiating abduction of the arm?

Accepted Answer

Supraspinatus

Question 8

Which muscle group is most important for maintaining posture and allowing for extension of the vertebral column?

Accepted Answer

Erector spinae

Question 9

A patient is unable to voluntarily control urination. Which muscle is most likely impaired?

Accepted Answer

External urethral sphincter

Question 10

Which of the following best explains why the calcaneal (Achilles) tendon is particularly vulnerable to injury?

Accepted Answer

It is subjected to high forces due to the foot acting as a second-class lever

Question 11

Which muscle is primarily responsible for flexing the forearm at the elbow joint?

Accepted Answer

Biceps brachii

Question 12

A muscle named 'flexor carpi ulnaris' most likely has which of the following characteristics?

Accepted Answer

Flexes the wrist and is located on the ulnar side

Question 13

Which of the following muscles is most involved in voluntary control of defecation?

Accepted Answer

External anal sphincter

Question 14

A patient with a herniated intervertebral disc compressing a spinal nerve root is most likely to experience which symptom?

Accepted Answer

Back pain

Question 15

Which muscle is responsible for compressing the cheeks and manipulating food while chewing?

Accepted Answer

Buccinator

Question 16

Which of the following best describes the action of the superior oblique muscle of the eye?

Accepted Answer

Rotates the eyeball downward and toward the lateral side

Question 17

Which muscle group is most important for adducting the thigh at the hip joint?

Accepted Answer

Adductor group (adductor magnus, longus, brevis)

Question 18

Which of the following is a function of the diaphragm muscle?

Accepted Answer

Plays a vital role in respiration

Question 19

A patient is unable to extend their leg at the knee after an injury. Which muscle group is most likely damaged?

Accepted Answer

Quadriceps femoris

Question 20

Which of the following best describes the mechanical advantage of a lever system where the fulcrum is farther from the applied force than the load?

Accepted Answer

Allows a small force to move a large load over a short distance

Study Guide: The Muscular System (Chapter 9) – Human Anatomy & Physiology

Study Guide - Practice Questions