$$\text{C}_6\text{H}_{12}\text{O}_6 + 2\text{ADP} + 2\text{P}_i \rightarrow 2\text{C}_3\text{H}_4\text{O}_3 + 2\text{ATP} + 2\text{H}_2\text{O}$$

Question 1

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

Accepted Answer

Elasticity

Question 2

A patient is unable to move their arm due to a severed nerve. Which property of skeletal muscle is most directly affected?

Accepted Answer

Excitability

Question 3

Which connective tissue layer surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 4

During a muscle contraction, which band remains the same width?

Accepted Answer

A band

Question 5

Which of the following best describes the role of calcium ions in skeletal muscle contraction?

Accepted Answer

They bind to troponin, causing tropomyosin to move and expose active sites on actin.

Question 6

A muscle fiber is stimulated so frequently that relaxation does not occur between stimuli. What is this condition called?

Accepted Answer

Complete tetanus

Question 7

Which equation correctly represents the net ATP yield from glycolysis of one glucose molecule?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 2	ext{ADP} + 2	ext{P}_i ightarrow 2	ext{C}_3	ext{H}_4	ext{O}_3 + 2	ext{ATP} + 2	ext{H}_2	ext{O}$$

Question 8

Which type of muscle contraction occurs when you attempt to lift a weight that is too heavy to move?

Accepted Answer

Isometric

Question 9

Which of the following is a characteristic unique to cardiac muscle tissue?

Accepted Answer

Intercalated discs

Question 10

A marathon runner’s leg muscles are dominated by which type of muscle fiber?

Accepted Answer

Slow fibers

Question 11

Which process is responsible for the removal of lactic acid from muscle cells after intense exercise?

Accepted Answer

Cori cycle

Question 12

Which of the following best explains why rigor mortis occurs after death?

Accepted Answer

ATP is depleted, preventing cross-bridge detachment.

Question 13

Which hormone increases the rate of energy consumption in both resting and active muscles?

Accepted Answer

Thyroid hormone

Question 14

Which of the following is true regarding the length-tension relationship in skeletal muscle?

Accepted Answer

Maximum tension is produced at an optimal sarcomere length with maximal cross-bridge formation.

Question 15

Which of the following best describes the role of creatine phosphate (CP) in muscle contraction?

Accepted Answer

It stores energy that is used to convert ADP to ATP.

Question 16

Which of the following is a function of smooth muscle tissue in the digestive system?

Accepted Answer

Moving materials along the digestive tract

Question 17

Which event occurs first at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Arrival of an action potential at the axon terminal

Question 18

Which of the following best describes the difference between isotonic and isometric contractions?

Accepted Answer

Isotonic contractions change muscle length, while isometric contractions do not.

Question 19

Which protein acts as a molecular spring to help return the sarcomere to its resting length after contraction?

Accepted Answer

Titin

Question 20

Which of the following is a consequence of muscle atrophy?

Accepted Answer

Reduction in muscle size, tone, and power

Muscle Tissue: Structure, Function, and Physiology

Study Guide - Practice Questions