Q: Which equation correctly represents the conversion of glucose to pyruvate during glycolysis?

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

Q: Which equation represents the breakdown of ATP to release energy for muscle contraction?

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

Question 1

Which type of muscle tissue is primarily responsible for voluntary movements such as walking, typing, or lifting weights?

Accepted Answer

Skeletal muscle tissue

Question 2

A patient is experiencing difficulty swallowing and has impaired movement of food through the digestive tract. Which muscle tissue is most likely affected?

Accepted Answer

Smooth muscle tissue

Question 3

Which of the following best describes the function of cardiac muscle tissue?

Accepted Answer

Propels blood through blood vessels by rhythmic contractions

Question 4

During intense exercise, skeletal muscle cells rely on glycolysis for ATP production. What is the end product of glycolysis under anaerobic conditions?

Accepted Answer

Lactate

Question 5

Which equation correctly represents the conversion of glucose to pyruvate during glycolysis?

Accepted Answer

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

Question 6

Which structure in skeletal muscle fibers stores calcium ions ($$	ext{Ca}^{2+}) $$necessary for muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 7

What is the role of acetylcholine (ACh) at the neuromuscular junction?

Accepted Answer

It binds to receptors on the sarcolemma to initiate an action potential

Question 8

Which phase of a muscle twitch is characterized by the time between the application of a stimulus and the beginning of contraction?

Accepted Answer

Latent period

Question 9

A muscle fiber is stimulated repeatedly before it can relax, resulting in a sustained contraction. What is this phenomenon called?

Accepted Answer

Tetanus

Question 10

Which of the following best explains why skeletal muscle contractions help maintain body temperature?

Accepted Answer

Muscle contractions convert chemical energy into heat

Question 11

Which of the following is a correct sequence of events in the contraction cycle of a skeletal muscle fiber?

Accepted Answer

Active-site exposure, cross-bridge formation, myosin head pivoting, bridge detachment, myosin reactivation

Question 12

Which muscle tissue type is most likely to be affected in a patient with arrhythmia (irregular heartbeat)?

Accepted Answer

Cardiac muscle tissue

Question 13

Which of the following statements about smooth muscle tissue is TRUE?

Accepted Answer

It regulates the diameter of small arteries

Question 14

A bodybuilder’s increased muscle mass is primarily due to hypertrophy of which muscle tissue?

Accepted Answer

Skeletal muscle tissue

Question 15

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

Accepted Answer

Propelling blood through blood vessels

Question 16

What is the primary neurotransmitter released at the neuromuscular junction to stimulate skeletal muscle contraction?

Accepted Answer

Acetylcholine (ACh)

Question 17

Which of the following best describes the role of the sarcolemma in muscle contraction?

Accepted Answer

It is the plasma membrane that conducts action potentials

Question 18

Which process allows skeletal muscle fibers to continue contracting when oxygen is limited?

Accepted Answer

Glycolysis

Question 19

Which of the following is a distinguishing feature of cardiac muscle tissue compared to skeletal muscle tissue?

Accepted Answer

Cardiac muscle tissue is striated and has intercalated discs

Question 20

Which equation represents the breakdown of ATP to release energy for muscle contraction?

Accepted Answer

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

Muscle Tissue: Structure, Function, and Physiology

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