$$\text{ADP} + \text{creatine phosphate} \rightarrow \text{ATP} + \text{creatine}$$

$$\text{Glucose} \rightarrow 2\text{Pyruvate} + 2\text{ATP}$$

Question 1

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

Accepted Answer

Elasticity

Question 2

During muscle contraction, which band of the sarcomere remains unchanged in width?

Accepted Answer

A band

Question 3

A patient presents with muscle stiffness after death. Which process is responsible for this phenomenon?

Accepted Answer

Rigor mortis

Question 4

Which equation correctly represents the conversion of creatine phosphate to ATP during muscle contraction?

Accepted Answer

$$	ext{ADP} + 	ext{creatine phosphate} ightarrow 	ext{ATP} + 	ext{creatine}$$

Question 5

Which protein binds calcium ions to initiate muscle contraction in skeletal muscle?

Accepted Answer

Troponin

Question 6

A muscle fiber is stimulated repeatedly at a frequency greater than 50/second, resulting in increased tension. What is this phenomenon called?

Accepted Answer

Wave summation

Question 7

Which of the following best describes the relationship between load and speed of muscle contraction?

Accepted Answer

The heavier the load, the slower the contraction

Question 8

Which type of muscle fiber is most resistant to fatigue and contains the highest amount of myoglobin?

Accepted Answer

Slow fibers

Question 9

In the sliding-filament theory, what happens to the H band during muscle contraction?

Accepted Answer

It narrows

Question 10

Which of the following is NOT a function of skeletal muscle?

Accepted Answer

Pumping blood through the cardiovascular system

Question 11

A muscle contraction in which tension is produced but the muscle does not change length is called:

Accepted Answer

Isometric contraction

Question 12

Which structure is responsible for transmitting action potentials deep into the muscle fiber?

Accepted Answer

Transverse tubules (T tubules)

Question 13

Which of the following best explains why cardiac muscle cannot undergo tetanic contractions?

Accepted Answer

Cardiac muscle has longer refractory periods

Question 14

During the contraction cycle, what is the role of ATP in the cross-bridge detachment step?

Accepted Answer

ATP binds to myosin head, causing it to detach from actin

Question 15

Which equation represents the net gain of ATP molecules during glycolysis?

Accepted Answer

$$	ext{Glucose} ightarrow 2	ext{Pyruvate} + 2	ext{ATP}$$

Question 16

Which muscle tissue type is characterized by spindle-shaped cells, a single central nucleus, and no striations?

Accepted Answer

Smooth muscle

Question 17

Which lever class is most common in the human body and maximizes speed and distance at the expense of force?

Accepted Answer

Third-class lever

Question 18

Which of the following is a real-life example of a second-class lever in the human body?

Accepted Answer

Ankle extension (plantar flexion) by calf muscles

Question 19

Which process describes the increase in muscle tension due to the recruitment of additional motor units?

Accepted Answer

Recruitment

Question 20

Which hormone stimulates muscle metabolism, increases both the duration of stimulation and the force of contraction?

Accepted Answer

Epinephrine

Muscle Tissue: Structure, Function, and Physiology

Study Guide - Practice Questions