Question 1

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

Accepted Answer

Elasticity

Question 2

A muscle fiber is observed under a microscope and shows striations, multiple nuclei, and elongated cells. Which type of muscle tissue is this most likely to be?

Accepted Answer

Skeletal muscle

Question 3

During muscle contraction, which of the following statements is TRUE according to the sliding filament model?

Accepted Answer

The sarcomere shortens, but the filaments themselves do not

Question 4

Which protein forms the backbone of the thin filament in skeletal muscle?

Accepted Answer

Actin

Question 5

What is the primary function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

To store and release calcium ions

Question 6

Which of the following best describes the process of excitation-contraction coupling?

Accepted Answer

The sequence of events by which an action potential leads to muscle contraction

Question 7

During the power stroke of cross bridge cycling, which molecules are released from the myosin head?

Accepted Answer

ADP and Pi

Question 8

Which equation represents the regeneration of ATP from ADP and inorganic phosphate in muscle cells?

Accepted Answer

$$\mathrm{ADP} + \mathrm{Pi} \rightarrow \mathrm{ATP}$$

Question 9

A patient is experiencing muscle fatigue after intense exercise. Which of the following is most likely occurring at the cellular level?

Accepted Answer

Muscle fibers are unable to contract despite continued stimulation

Question 10

Which factor does NOT directly determine the force of muscle contraction?

Accepted Answer

Amount of oxygen in the blood

Question 11

Which pathway is primarily used for ATP production during prolonged-duration, low-intensity exercise?

Accepted Answer

Aerobic respiration

Question 12

What is the role of acetylcholinesterase at the neuromuscular junction?

Accepted Answer

It breaks down acetylcholine in the synaptic cleft

Question 13

Which muscle fiber type is best suited for endurance activities such as marathon running?

Accepted Answer

Slow oxidative fibers

Question 14

If a muscle is stretched beyond its optimal length, what happens to the contractile force?

Accepted Answer

Contractile force decreases

Question 15

Which of the following is TRUE regarding smooth muscle?

Accepted Answer

It uses calmodulin instead of troponin for Ca2+ binding

Question 16

Which of the following best describes muscle tone?

Accepted Answer

A constant slight contraction of some motor units

Question 17

Which of the following is a function of skeletal muscle?

Accepted Answer

Produce movement

Question 18

During high-intensity, short-duration exercise, which pathway is primarily used for ATP production?

Accepted Answer

Anaerobic glycolysis

Question 19

Which equation best represents the anaerobic pathway for ATP production in muscle cells?

Accepted Answer

$$\mathrm{Glucose} \rightarrow \mathrm{Pyruvic\ acid} \rightarrow \mathrm{Lactic\ acid}$$

Question 20

Which of the following is NOT a characteristic of cardiac muscle?

Accepted Answer

Multinucleate cells

Study Guide: The Muscular System (ANP College Level)

Study Guide - Practice Questions

Study Guide - Flashcards