$$ATP \rightarrow ADP + Pi + \text{energy}$$

Question 1

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

Accepted Answer

Elasticity

Question 2

A muscle cell is stimulated by a neuron at the neuromuscular junction. Which ion is released from the sarcoplasmic reticulum to trigger contraction?

Accepted Answer

$$Ca^{2+}$$

Question 3

Which connective tissue sheath surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 4

During muscle contraction, which protein does calcium bind to in order to expose the active sites on actin?

Accepted Answer

Troponin

Question 5

Which of the following is TRUE about skeletal muscle tissue?

Accepted Answer

It is voluntary and striated

Question 6

What is the function of acetylcholine esterase (AChE) at the neuromuscular junction?

Accepted Answer

It breaks down acetylcholine in the synaptic cleft

Question 7

Which structure is continuous with the sarcolemma and penetrates the cell’s interior at each A band–I band junction?

Accepted Answer

T tubule

Question 8

A patient is exposed to curare, a poison that inhibits acetylcholine receptors. What is the most likely outcome?

Accepted Answer

Muscle paralysis

Question 9

Which equation best represents the hydrolysis of ATP during muscle contraction?

Accepted Answer

$$ATP ightarrow ADP + Pi + 	ext{energy}$$

Question 10

Which muscle attachment is typically more proximal and less mobile?

Accepted Answer

Origin

Question 11

What is the primary function of myosatellite cells in skeletal muscle?

Accepted Answer

Repair and regenerate muscle tissue

Question 12

Which band or zone shortens during muscle contraction?

Accepted Answer

H zone

Question 13

Which of the following is NOT a requirement for skeletal muscle contraction?

Accepted Answer

Continuous release of acetylcholine esterase

Question 14

A muscle fiber is multinucleate. What does this mean?

Accepted Answer

It has more than one nucleus per cell

Question 15

Which event occurs first in the process of muscle contraction?

Accepted Answer

Acetylcholine is released from the axon terminal

Question 16

Which muscle tissue type contains gap junctions and acts as a pump?

Accepted Answer

Cardiac muscle

Question 17

Which of the following best describes the role of the Na^+-K^+ pump in muscle cells?

Accepted Answer

It maintains the resting membrane potential

Question 18

Which of the following would result from inhibition of acetylcholine esterase by an insecticide?

Accepted Answer

Continuous muscle contraction

Question 19

Which structure transmits the pulling force generated by muscle fiber contraction to the bone?

Accepted Answer

Tendon

Question 20

Which of the following is a real-world example of chemical interference at the neuromuscular junction?

Accepted Answer

Botox injections causing local paralysis

Skeletal Muscle Structure and Function: Study Notes for Anatomy & Physiology

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