Q: Which equation best represents the process of ATP regeneration using creatine phosphate in skeletal muscle?

$$\text{ADP} + \text{Creatine Phosphate} \rightarrow \text{ATP} + \text{Creatine}$$

Q: A muscle fiber is at rest. Which equation describes the resting membrane potential established by Na+/K+ pumps?

$$\text{RMP} = -90\ \text{mV}$$

Q: Which equation best represents aerobic cellular respiration in muscle cells?

$$\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + 36\text{ATP}$$

Question 1

Which characteristic of skeletal muscle tissue allows it to return to its original length after being stretched or shortened?

Accepted Answer

Elasticity

Question 2

A patient with muscular dystrophy is found to have abnormalities in a protein that anchors myofibrils to sarcolemma proteins. Which protein is most likely affected?

Accepted Answer

Dystrophin

Question 3

During muscle contraction, which event directly follows the binding of ATP to the myosin head?

Accepted Answer

Release of myosin head from actin

Question 4

Which structure is responsible for storing and releasing calcium ions during skeletal muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 5

A muscle fiber is stimulated to contract, but the contraction is brief and powerful, and the fiber is white in color. Which type of muscle fiber is this?

Accepted Answer

Fast glycolytic (FG) fiber

Question 6

Which equation best represents the process of ATP regeneration using creatine phosphate in skeletal muscle?

Accepted Answer

$$	ext{ADP} + 	ext{Creatine Phosphate} ightarrow 	ext{ATP} + 	ext{Creatine}$$

Question 7

Which layer of connective tissue surrounds individual muscle fibers and provides electrical insulation?

Accepted Answer

Endomysium

Question 8

In a muscle cell, which structure is formed by the combination of two terminal cisternae and a T-tubule?

Accepted Answer

Triad

Question 9

Which of the following best describes the sliding filament theory?

Accepted Answer

Thin filaments slide past thick filaments, causing sarcomere shortening

Question 10

A muscle is stimulated and produces tension without changing its length. What type of contraction is this?

Accepted Answer

Isometric contraction

Question 11

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

Accepted Answer

Regulating blood pressure

Question 12

During excitation-contraction coupling, which ion is released from the sarcoplasmic reticulum to initiate contraction?

Accepted Answer

Calcium (Ca2+)

Question 13

Which protein binds calcium during muscle contraction, leading to exposure of the myosin binding site on actin?

Accepted Answer

Troponin

Question 14

A muscle fiber is at rest. Which equation describes the resting membrane potential established by Na+/K+ pumps?

Accepted Answer

$$	ext{RMP} = -90\ 	ext{mV}$$

Question 15

Which type of muscle fiber is most resistant to fatigue and is best suited for endurance activities?

Accepted Answer

Slow oxidative (SO) fiber

Question 16

Which structure in skeletal muscle is responsible for the precise control of force output?

Accepted Answer

Small motor units

Question 17

Which process is primarily responsible for muscle fatigue during prolonged exercise?

Accepted Answer

Decrease in glycogen stores

Question 18

Which equation best represents aerobic cellular respiration in muscle cells?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 36	ext{ATP}$$

Question 19

Which of the following is a function of the superficial fascia?

Accepted Answer

Separates muscles from skin

Question 20

Which regulatory protein blocks the myosin binding site on actin in a relaxed muscle?

Accepted Answer

Tropomyosin

Muscular Tissue: Structure, Function, and Physiology

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