Question 1

Which connective tissue layer directly surrounds individual skeletal muscle fibers?

Accepted Answer

Endomysium

Question 2

A patient presents with pain and limited movement after overstretching a muscle during a soccer game. Which treatment is LEAST appropriate in the initial management of a muscle strain?

Accepted Answer

Immediate vigorous exercise of the muscle

Question 3

Which muscle shape is characterized by fascicles that attach obliquely to a central tendon, resembling a feather?

Accepted Answer

Pennate

Question 4

A muscle that acts as a fixator during elbow flexion is primarily responsible for:

Accepted Answer

Holding a bone steady to increase movement efficiency

Question 5

Which of the following best describes a third-class lever in the human body?

Accepted Answer

The force is applied between the load and the fulcrum; e.g., elbow joint with biceps brachii

Question 6

Which muscle is the primary agonist for arm abduction at the shoulder joint?

Accepted Answer

Deltoid (central portion)

Question 7

A patient is unable to close their eyelids tightly. Which muscle is most likely affected?

Accepted Answer

Orbicularis oculi

Question 8

During swallowing, which muscle group contracts in sequence to push food into the esophagus?

Accepted Answer

Pharyngeal constrictor muscles

Question 9

Which of the following muscles is responsible for dorsiflexion and inversion of the foot?

Accepted Answer

Tibialis anterior

Question 10

A patient with a complete tear of the calcaneal tendon will be unable to perform which movement?

Accepted Answer

Plantarflexion of the foot

Question 11

Which muscle is a powerful flexor of the thigh and can also flex the trunk when the femur is fixed?

Accepted Answer

Iliopsoas

Question 12

Which of the following best explains the mechanical advantage in a lever system?

Accepted Answer

The fulcrum is placed close to the load, allowing a small force to move a large load

Question 13

Which muscle group is most important for stabilizing the shoulder joint during forceful overhead movements?

Accepted Answer

Rotator cuff muscles

Question 14

A patient is unable to abduct their thigh and has difficulty maintaining pelvic stability while walking. Which muscle is most likely weakened?

Accepted Answer

Gluteus medius

Question 15

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

Accepted Answer

Brachialis

Question 16

Which of the following muscles is a major contributor to forced expiration by depressing the rib cage?

Accepted Answer

Internal intercostal muscles

Question 17

A patient with urinary incontinence is advised to perform Kegel exercises. Which muscle group is targeted by these exercises?

Accepted Answer

Levator ani muscle

Question 18

Which muscle is responsible for protracting the scapula and is essential for throwing a punch?

Accepted Answer

Serratus anterior

Question 19

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

Accepted Answer

Teres major

Question 20

A patient presents with difficulty flexing the trunk and a loss of the 'six-pack' appearance. Which muscle is most likely affected?

Accepted Answer

Rectus abdominis

Chapter 9: The Muscular System – Structure, Function, and Major Muscles

Study Guide - Practice Questions

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