Question 1

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

Accepted Answer

Elasticity

Question 2

A patient is unable to voluntarily control swallowing and urination. Which type of muscle tissue is most likely affected?

Accepted Answer

Skeletal muscle

Question 3

Which connective tissue layer surrounds individual muscle fibers within a fascicle?

Accepted Answer

Endomysium

Question 4

During muscle contraction, which structure stores and releases calcium ions ($$\mathrm{Ca$$^{2+}$$}) to $$trigger the process?

Accepted Answer

Sarcoplasmic reticulum

Question 5

Which of the following best describes the sliding filament model of muscle contraction?

Accepted Answer

Myosin heads bind to actin, pulling thin filaments toward the M line

Question 6

A sprinter is likely to have a higher proportion of which muscle fiber type in their leg muscles?

Accepted Answer

Fast-twitch (Type IIb)

Question 7

Which muscle fiber type is most resistant to fatigue and relies primarily on aerobic respiration for ATP production?

Accepted Answer

Slow-twitch (Type I)

Question 8

If a muscle fiber cannot divide, how does it repair itself after injury?

Accepted Answer

By activation of satellite cells to repair damaged portions

Question 9

Which of the following muscle arrangements allows for the greatest range of motion but the least force production?

Accepted Answer

Parallel muscles

Question 10

A muscle that acts as a prime mover for elbow flexion is called a(n):

Accepted Answer

Agonist

Question 11

Which of the following is true regarding muscle hypertrophy?

Accepted Answer

It is caused by exhaustive stimulation leading to increased mitochondria and glycogen reserves

Question 12

Which muscle fiber type is most abundant in muscles responsible for small, rapid movements, such as those in the eyes and hands?

Accepted Answer

Fast-twitch (Type IIb)

Question 13

What is the main function of the protein titin in the sarcomere?

Accepted Answer

To connect myosin to the Z line and provide elasticity

Question 14

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

Accepted Answer

It moves tropomyosin away from actin's active sites when calcium binds

Question 15

A muscle that surrounds an orifice and controls its opening and closing is classified as:

Accepted Answer

Circular

Question 16

Which equation best represents the increased ATP yield from aerobic respiration in slow-twitch muscle fibers compared to glycolysis in fast-twitch fibers?

Accepted Answer

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

Question 17

Which of the following changes occurs in skeletal muscle tissue as we age?

Accepted Answer

Decrease in myofibril number, glycogen reserves, and myoglobin

Question 18

A muscle named 'flexor carpi radialis' is likely to:

Accepted Answer

Flex the wrist near the radius

Question 19

Which of the following statements about motor units is correct?

Accepted Answer

All muscle fibers in a motor unit contract together when stimulated

Question 20

Which muscle arrangement is best suited for producing the greatest force?

Accepted Answer

Pennate muscles

Skeletal Muscle Tissue and Muscular System Organization

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