Question 1

Which of the following is NOT a characteristic of muscular tissue?

Accepted Answer

Muscles are rigid and cannot return to their original shape.

Question 2

A muscle that produces most of the force during a particular joint action is called the:

Accepted Answer

Prime mover (agonist)

Question 3

Which connective tissue layer directly surrounds each individual muscle fiber?

Accepted Answer

Endomysium

Question 4

A patient presents with severe pain and swelling in the lower leg after a car accident. Urinalysis reveals myoglobin in the urine. What is the most likely diagnosis?

Accepted Answer

Compartment syndrome

Question 5

Which muscle acts as the antagonist during flexion of the elbow?

Accepted Answer

Triceps brachii

Question 6

What is the correct order of connective tissue layers from outermost to innermost in a skeletal muscle?

Accepted Answer

Epimysium, perimysium, endomysium

Question 7

A muscle that stabilizes a bone so another muscle can act as a prime mover is called a:

Accepted Answer

Fixator

Question 8

Which of the following best describes an indirect muscle attachment?

Accepted Answer

A tendon connects the muscle to bone.

Question 9

Which muscle is a synergist to the brachialis during elbow flexion?

Accepted Answer

Biceps brachii

Question 10

A weightlifter develops a bulge in the lower abdomen after heavy lifting. Which condition is most likely?

Accepted Answer

Hernia

Question 11

Which of the following muscles is NOT part of the infrahyoid group?

Accepted Answer

Mylohyoid

Question 12

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

Accepted Answer

Masseter

Question 13

A baseball pitcher experiences shoulder pain and weakness after repetitive throwing. Which structure is most likely injured?

Accepted Answer

Rotator cuff tendon

Question 14

Which of the following best describes the function of the perimysium?

Accepted Answer

Separates and surrounds fascicles of muscle fibers

Question 15

If a muscle exerts a force of $$F = 200\ \mathrm{N}$$ over a distance of $$d = 0.5\ \mathrm{m}$$, what is the work done by the muscle? (Use $$W = F 	imes d)$$

Accepted Answer

$$W = 100\ \mathrm{J}$$

Question 16

Which muscle is responsible for preventing the scapula from moving laterally during elbow flexion?

Accepted Answer

Rhomboids

Question 17

Which of the following is a real-life example of a muscle acting as a fixator?

Accepted Answer

The rhomboids stabilizing the scapula during a biceps curl

Question 18

A patient is unable to depress the hyoid bone after swallowing. Which muscle is most likely impaired?

Accepted Answer

Sternohyoid

Question 19

Which of the following statements about muscle attachments is correct?

Accepted Answer

Tendons are involved in indirect muscle attachments.

Question 20

Which muscle is most likely to be injured in a tennis player experiencing shoulder pain from repetitive overhead movements?

Accepted Answer

Infraspinatus

Chapter 10: The Muscular System – Structure, Function, and Organization

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