Question 1

Which type of sensory receptor is primarily responsible for detecting changes in blood pH?

Accepted Answer

Chemoreceptors

Question 2

A patient is unable to distinguish between two closely spaced points on their forearm, but can do so easily on their fingertip. Which concept best explains this difference?

Accepted Answer

Receptive field size

Question 3

Which equation best represents the relationship between stimulus intensity and frequency coding in sensory neurons?

Accepted Answer

$$f = k 	imes I$$

Question 4

Which of the following is NOT a function of mechanoreceptors?

Accepted Answer

Responding to photons of light

Question 5

A person experiences referred pain in their left arm during a heart attack. What is the physiological basis for this phenomenon?

Accepted Answer

Convergence of visceral and somatic sensory pathways in the spinal cord

Question 6

Which structure in the ear is responsible for transducing sound waves into electrical signals?

Accepted Answer

Organ of Corti

Question 7

Which type of hearing loss is caused by damage to the neural pathway between the ear and the cerebral cortex?

Accepted Answer

Central hearing loss

Question 8

What is the main function of the otolith organs in the vestibular apparatus?

Accepted Answer

Sensing linear acceleration and head position

Question 9

Which neurotransmitter is released by rods in the retina in the dark?

Accepted Answer

Glutamate

Question 10

A patient with color blindness is most likely to have a defect in which type of photoreceptor?

Accepted Answer

Cones

Question 11

Which process allows the eye to adjust the lens shape to keep objects in focus at different distances?

Accepted Answer

Accommodation

Question 12

Which equation describes the focal length ($$f) of a $$lens in terms of the refractive index ($$n) $$and curvature ($$C$$)?

Accepted Answer

$$f = \frac{1}{nC}$$

Question 13

Which of the following best explains the function of lateral inhibition in sensory processing?

Accepted Answer

It enhances contrast and localization of stimuli

Question 14

Which type of sensory adaptation is characterized by receptors that respond continuously as long as the stimulus is present?

Accepted Answer

Tonic adaptation

Question 15

Which cranial nerve carries auditory information from the cochlea to the brain?

Accepted Answer

CN VIII (Vestibulocochlear)

Question 16

Which of the following is a correct sequence for the transmission of visual information from the retina to the brain?

Accepted Answer

Photoreceptors → Bipolar cells → Ganglion cells → Optic nerve → Thalamus → Visual cortex

Question 17

Which of the following best describes the role of the gate control theory in pain modulation?

Accepted Answer

AB fibers activate inhibitory interneurons to decrease pain perception

Question 18

Which of the following is a function of the maculae in the vestibular apparatus?

Accepted Answer

Sensing linear acceleration and head position

Question 19

Which of the following best explains why the optic disk is called the 'blind spot'?

Accepted Answer

It lacks photoreceptors

Question 20

Which of the following is true regarding the process of phototransduction in rods?

Accepted Answer

Light causes rhodopsin to activate a G protein cascade that closes CNG channels

Sensory Physiology: General Properties of Sensory Systems

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