Question 1

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

Accepted Answer

They carry sensory information from receptors to the central nervous system.

Question 2

A patient is unable to detect changes in muscle length and tension. Which type of receptor is most likely damaged?

Accepted Answer

Proprioceptors

Question 3

Which of the following is an example of a mechanoreceptor?

Accepted Answer

Muscle spindle

Question 4

If a stimulus is strong enough to reach threshold, what is the result at the receptor level?

Accepted Answer

An action potential is generated and propagated along the afferent neuron.

Question 5

Which equation best represents the relationship between stimulus intensity and action potential frequency?

Accepted Answer

$$f = k \cdot I$$

Question 6

A person touches a hot stove and quickly withdraws their hand. Which type of receptor initiates this response?

Accepted Answer

Nociceptor

Question 7

Which of the following best explains why adaptation occurs in sensory receptors?

Accepted Answer

To prevent overstimulation by decreasing receptor sensitivity to unchanging stimuli.

Question 8

Which sensory pathway is responsible for transmitting information about fine touch and proprioception to the brain?

Accepted Answer

Dorsal column-medial lemniscal pathway

Question 9

A lesion in the lateral geniculate nucleus would most directly affect which sense?

Accepted Answer

Vision

Question 10

Which of the following statements about receptive fields is correct?

Accepted Answer

Smaller receptive fields allow for greater sensory discrimination.

Question 11

Which process enhances the contrast between strongly and weakly stimulated regions in sensory pathways?

Accepted Answer

Lateral inhibition

Question 12

A patient has difficulty detecting changes in blood pressure. Which receptor type is most likely impaired?

Accepted Answer

Baroreceptor

Question 13

Which of the following best describes the function of the muscle spindle?

Accepted Answer

Detects changes in muscle length

Question 14

Which of the following is a correct example of a special sense?

Accepted Answer

Vision

Question 15

Which structure in the eye is responsible for focusing light onto the retina?

Accepted Answer

Lens

Question 16

Which of the following best explains the role of rhodopsin in vision?

Accepted Answer

It is a pigment in rods that changes shape when exposed to light, initiating a phototransduction cascade.

Question 17

Which of the following best describes the function of the cochlea?

Accepted Answer

It transduces sound vibrations into neural signals.

Question 18

Which of the following equations best represents the relationship between the frequency of a sound wave ($$f$$), the speed of sound ($$v$$), and its wavelength ($$\lambda$$)?

Accepted Answer

$$f = \frac{v}{\lambda}$$

Question 19

A person is unable to distinguish between salty and sweet tastes. Which cranial nerves are most likely affected?

Accepted Answer

Facial (VII) and Glossopharyngeal (IX)

Question 20

Which of the following best describes the process of sensory transduction?

Accepted Answer

Conversion of a sensory stimulus into a change in membrane potential.

Peripheral Nervous System: Afferent Pathways and Special Senses

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