$\mathrm{C_6H_{12}O_6} + 6\mathrm{O_2} \rightarrow 6\mathrm{CO_2} + 6\mathrm{H_2O} + \text{ATP}$

Question 1

Which of the following best describes the primary function of skeletal muscle tissue?

Accepted Answer

Movement, maintenance of posture, facial expression, and heat production

Question 2

Cardiac muscle is unique among muscle types because it is:

Accepted Answer

Striated, involuntary, and contains intercalated discs

Question 3

Which connective tissue layer surrounds an individual muscle fiber?

Accepted Answer

Endomysium

Question 4

The sarcolemma is best defined as:

Accepted Answer

The plasma membrane of a muscle cell

Question 5

Which organelle stores calcium ions necessary for muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 6

During muscle contraction, which event occurs immediately after acetylcholine binds to its receptor on the sarcolemma?

Accepted Answer

Sodium channels open, leading to depolarization of the sarcolemma

Question 7

Which equation correctly represents the process of ATP production during aerobic respiration in muscle cells?

Accepted Answer

$\mathrm{C_6H_{12}O_6} + 6\mathrm{O_2} ightarrow 6\mathrm{CO_2} + 6\mathrm{H_2O} + 	ext{ATP}$

Question 8

A patient with Myasthenia Gravis is likely to experience which of the following symptoms?

Accepted Answer

Progressive muscle weakness and drooping eyelids

Question 9

Which of the following best explains the role of the mitochondria in muscle contraction?

Accepted Answer

Synthesizes ATP required for myosin head detachment from actin

Question 10

Which step occurs during muscle relaxation after contraction?

Accepted Answer

Calcium ions are actively pumped back into the sarcoplasmic reticulum

Question 11

A muscle's origin is defined as:

Accepted Answer

The immovable or less movable attachment of the muscle

Question 12

Which of the following is the correct sequence of events for muscle contraction?

Accepted Answer

Release of calcium ions, binding of myosin to actin, ATP hydrolysis, power stroke

Question 13

Which muscle type is responsible for involuntary movements in the digestive tract?

Accepted Answer

Smooth muscle

Question 14

A muscle that acts as the primary mover during a specific action is called the:

Accepted Answer

Agonist

Question 15

Which of the following best describes the process of repolarization in a muscle cell?

Accepted Answer

Potassium ions exit the cell, restoring the negative charge inside the sarcolemma

Question 16

Which of the following is a correct description of the neuromuscular junction?

Accepted Answer

The site where a motor neuron releases acetylcholine to stimulate a muscle fiber

Question 17

Which of the following is a plausible consequence of a defect in the acetylcholine receptor at the neuromuscular junction?

Accepted Answer

Muscle contraction would be impaired due to reduced signal transmission

Question 18

Which of the following best explains why ATP is required for muscle relaxation?

Accepted Answer

ATP is needed to detach myosin heads from actin filaments

Question 19

Which of the following is a real-world example of a disease affecting the neuromuscular junction?

Accepted Answer

Myasthenia Gravis

Question 20

Which of the following statements about muscle insertion is correct?

Accepted Answer

Insertion is the movable attachment of the muscle

Chapter 6: The Muscular System – Structure, Function, and Physiology

Study Guide - Practice Questions