$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which property of muscle tissue allows it to return to its original length after being stretched or contracted?

Accepted Answer

Elasticity

Question 2

A patient suffers a deep laceration that damages the connective tissue surrounding individual muscle fibers. Which layer is most likely affected?

Accepted Answer

Endomysium

Question 3

During muscle contraction, which band remains constant in width?

Accepted Answer

A band

Question 4

Which of the following best describes the role of acetylcholinesterase (AChE) at the neuromuscular junction?

Accepted Answer

It breaks down acetylcholine in the synaptic cleft, terminating the signal.

Question 5

Which muscle fiber type is most abundant in the leg muscles of marathon runners?

Accepted Answer

Slow fibers (red fibers)

Question 6

A muscle that forms concentric rings around an orifice is classified as which type?

Accepted Answer

Circular muscle

Question 7

Which of the following is TRUE regarding the sliding filament theory of muscle contraction?

Accepted Answer

The Z lines move closer together as the muscle contracts.

Question 8

Which connective tissue layer divides a muscle into parallel compartments of fascicles?

Accepted Answer

Perimysium

Question 9

A muscle that has fibers on both sides of a central tendon is classified as:

Accepted Answer

Bipennate

Question 10

Which of the following statements about fast muscle fibers is CORRECT?

Accepted Answer

They fatigue rapidly and use anaerobic metabolism during glycolysis.

Question 11

Which muscle action term describes a muscle that assists the prime mover in performing an action?

Accepted Answer

Synergist

Question 12

What is the primary function of myosatellite cells in skeletal muscle?

Accepted Answer

Repairing damaged muscle tissue

Question 13

Which of the following is a correct example of a first-class lever in the human body?

Accepted Answer

Tilting the head forward and backward

Question 14

A muscle named 'flexor carpi radialis' provides which clue about its function and location?

Accepted Answer

It flexes the wrist near the radius.

Question 15

Which of the following changes occurs in skeletal muscle as a person ages?

Accepted Answer

Decrease in glycogen reserves and muscle strength

Question 16

Which equation best represents the hydrolysis of ATP required for muscle contraction?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 17

Which of the following best explains why muscle tone is important for posture?

Accepted Answer

It stabilizes the position of bones and joints even when the muscle is relaxed.

Question 18

A muscle that has two origins and is located in the upper arm is most likely the:

Accepted Answer

Biceps brachii

Question 19

Which of the following statements about motor units is TRUE?

Accepted Answer

The amount of force generated by a muscle depends on the number of motor units activated.

Question 20

Which protein covers the active sites on actin when the muscle is relaxed?

Accepted Answer

Tropomyosin

Chapter 10: The Muscular System – Skeletal Muscle Tissue and Muscle Organization

Study Guide - Practice Questions