Question 1

Which of the following best describes the role of the basilar membrane in the cochlea for sound processing?

Accepted Answer

It vibrates maximally at different locations depending on the frequency of the sound wave.

Question 2

What is the primary function of T-tubules in skeletal muscle fibers?

Accepted Answer

They bring action potentials from the sarcolemma into the interior of the muscle fiber.

Question 3

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

Accepted Answer

During contraction, actin and myosin filaments slide past each other without changing length.

Question 4

Which muscle type is under voluntary control and contains multiple nuclei per cell?

Accepted Answer

Skeletal muscle

Question 5

What is the correct sequence of events that leads to neurotransmitter release from auditory hair cells when stereocilia bend toward the tallest tip link?

Accepted Answer

K+ channels open, cell depolarizes, neurotransmitter release increases.

Question 6

Which of the following best explains how the brain localizes the source of a sound?

Accepted Answer

By comparing the timing of receptor activation in both ears.

Question 7

Which protein blocks the myosin-binding sites on actin in a relaxed muscle fiber?

Accepted Answer

Tropomyosin

Question 8

A patient has damage to the neural pathway between the ear and the auditory cortex. What type of hearing loss is this?

Accepted Answer

Central hearing loss

Question 9

Which of the following is true regarding antagonistic muscle groups?

Accepted Answer

They consist of flexors and extensors that produce opposite movements at a joint.

Question 10

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

Accepted Answer

It stores and releases calcium ions necessary for muscle contraction.

Question 11

During the cross-bridge cycle, what event causes the myosin head to detach from actin?

Accepted Answer

Binding of ATP to the myosin head

Question 12

Which of the following is a characteristic unique to cardiac muscle tissue?

Accepted Answer

It contains intercalated discs and is found only in the heart.

Question 13

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

Accepted Answer

It binds to Ca2+, causing a conformational change that moves tropomyosin away from actin’s binding sites.

Question 14

Which of the following is the correct order of muscle structure from largest to smallest?

Accepted Answer

Muscle, muscle fascicle, muscle fiber, myofibril, sarcomere

Question 15

Which of the following best explains why mammalian hair cells cannot be regenerated after damage?

Accepted Answer

They are terminally differentiated and do not divide.

Question 16

Which of the following is true regarding the control of skeletal muscle contraction?

Accepted Answer

It is initiated by a single motor neuron in the somatic nervous system.

Question 17

A muscle fiber is stimulated and contracts. Which of the following changes occur in the sarcomere?

Accepted Answer

The I band and H zone shorten, while the A band remains constant.

Question 18

Which of the following best describes the function of the afferent division of the peripheral nervous system?

Accepted Answer

It transmits sensory information from receptors to the CNS.

Question 19

Which of the following is a correct statement about the sarcolemma?

Accepted Answer

It is the cell membrane of the muscle fiber.

Muscle Physiology and Sensory Processing: Structure and Function of Muscle and Hearing

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