Question 1

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

Accepted Answer

Elasticity

Question 2

A patient presents with difficulty moving fluids through their digestive tract. Which type of muscle tissue is most likely impaired?

Accepted Answer

Smooth muscle tissue

Question 3

Which connective tissue sheath surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 4

During a concentric contraction, which of the following changes occur in the sarcomere?

Accepted Answer

The H zone disappears

Question 5

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

Accepted Answer

Slow oxidative fibers

Question 6

A marathon runner experiences sudden pain and swelling in the posterior thigh. MRI shows bright areas in the hamstring muscle. What is the most likely diagnosis?

Accepted Answer

Muscle strain with edema

Question 7

Which structure stores and releases calcium ions to initiate muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 8

What is the primary function of sphincter muscles?

Accepted Answer

Open and close body passageways

Question 9

Which prefix is commonly used to refer to muscle in anatomical terminology?

Accepted Answer

Myo-

Question 10

Which type of muscle tissue is striated and under voluntary control?

Accepted Answer

Skeletal muscle tissue

Question 11

A 25-year-old patient cannot flex their elbow and has numbness on the lateral forearm after an IV complication. Which nerve is most likely affected?

Accepted Answer

Musculocutaneous nerve

Question 12

Which molecule acts as a spring to resist overstretching in the sarcomere?

Accepted Answer

Titin

Question 13

Which equation best represents the ATP production in slow oxidative muscle fibers?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 36\mathrm{ATP}$$

Question 14

Which of the following is TRUE regarding the sliding filament mechanism?

Accepted Answer

Myosin heads pull thin filaments toward the center of the sarcomere

Question 15

Which muscle fiber type is best suited for rapid, powerful movements but fatigues quickly?

Accepted Answer

Fast glycolytic fibers

Question 16

Which structure is the plasma membrane of a muscle cell?

Accepted Answer

Sarcolemma

Question 17

Which disorder is characterized by muscle enlargement due to fat and connective tissue, followed by degeneration?

Accepted Answer

Muscular dystrophy

Question 18

Which process allows skeletal muscle fibers to contract by week 7 of development?

Accepted Answer

Fusion of myoblasts

Question 19

Which of the following best explains why males typically have a higher percentage of muscle mass than females?

Accepted Answer

Higher levels of androgens

Question 20

Which equation describes the anaerobic pathway for ATP production in fast glycolytic fibers?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} \rightarrow 2\mathrm{C_3H_6O_3} + 2\mathrm{ATP}$$

Skeletal Muscle Tissue: Structure, Properties, and Functions - Chapter 10

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