Question 1

Which property of muscle tissue allows it to respond to a stimulus, such as a nerve signal, and initiate an action potential?

Accepted Answer

Excitability

Question 2

A muscle cell is observed under a microscope and appears striated with multiple nuclei located at the periphery. Which type of muscle tissue is this most likely to be?

Accepted Answer

Skeletal muscle

Question 3

Which connective tissue layer directly surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 4

Which of the following best describes the organization of muscle from superficial to deep?

Accepted Answer

Epimysium → Fascicle → Endomysium → Myofibrils → Myofilaments

Question 5

During muscle contraction, which filament slides toward the center of the sarcomere, resulting in shortening of the muscle?

Accepted Answer

Actin

Question 6

Which type of muscle tissue is found in the walls of blood vessels and is not under voluntary control?

Accepted Answer

Smooth muscle

Question 7

A bundle of muscle fibers is called a:

Accepted Answer

Fascicle

Question 8

Which of the following is the smallest contractile unit of a muscle?

Accepted Answer

Sarcomere

Question 9

The plasma membrane of a muscle fiber is called the ________, and it wraps bundles of ________.

Accepted Answer

Sarcolemma; myofibrils

Question 10

Which of the following best explains why cardiac muscle can be influenced by the nervous system but is not under voluntary control?

Accepted Answer

Cardiac muscle is only found in the heart and is involuntary.

Question 11

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

Accepted Answer

Elasticity

Question 12

A muscle is observed to have striations, a single central nucleus per cell, and is found in the heart. Which type of muscle is this?

Accepted Answer

Cardiac muscle

Question 13

Which of the following statements about the sliding filament theory is correct?

Accepted Answer

Actin filaments slide over myosin filaments to shorten the sarcomere.

Question 14

Which connective tissue structure connects muscle to bone?

Accepted Answer

Tendon

Question 15

If you are looking at a muscle tissue under a microscope and see no striations, which type of muscle are you most likely observing?

Accepted Answer

Smooth muscle

Question 16

Which of the following best describes the function of the sarcoplasmic reticulum in muscle fibers?

Accepted Answer

It stores and releases $\mathrm{Ca^{2+}}$ ions necessary for muscle contraction.

Question 17

Which type of muscle cell is typically the largest in diameter?

Accepted Answer

Skeletal muscle cell

Question 18

A patient is diagnosed with a disease that affects the myosin filaments in their muscle cells. Which process would be most directly impaired?

Accepted Answer

The ability of the muscle to contract and generate force

Question 19

Which of the following is true regarding the nuclei in skeletal muscle fibers?

Accepted Answer

They have multiple nuclei located at the periphery.

Question 20

Which of the following best explains why marbling in beef is found in the connective tissue layers of muscle?

Accepted Answer

Fat accumulates in the connective tissue, such as the perimysium and endomysium, between muscle fibers and fascicles.

Muscle Tissue: Structure, Properties, and Function

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