Question 1

Which of the following best describes adaptation in sensory receptors?

Accepted Answer

Reduction of receptor sensitivity in the presence of a constant stimulus.

Question 2

Phasic receptors are characterized by which of the following responses to a constant stimulus?

Accepted Answer

They respond with a burst of action potentials at stimulus onset and then adapt quickly.

Question 3

Which type of receptor would most likely detect rapid changes in light intensity?

Accepted Answer

Phasic receptor

Question 4

A receptor in the skin that maintains its firing rate after you receive a paper cut is an example of:

Accepted Answer

Tonic receptor

Question 5

Which of the following is TRUE regarding tonic receptors?

Accepted Answer

They provide a sustained response to a constant stimulus.

Question 6

Thermoreceptors tend to be phasic receptors because they:

Accepted Answer

Adapt quickly to changes in temperature.

Question 7

Which of the following best describes the difference between phasic and tonic receptors?

Accepted Answer

Phasic receptors report changes in stimulus, while tonic receptors provide sustained responses.

Question 8

If a mechanoreceptor responds only at the onset and offset of pressure, but not during sustained pressure, it is classified as:

Accepted Answer

Phasic receptor

Question 9

Which of the following equations best represents the adaptation rate ($$k) of a $$phasic receptor, given that the receptor potential ($$E) $$decreases exponentially over time ($$t) $$after stimulus onset?

Accepted Answer

$$E = E_0$ 	imes e$$^{-kt}$$

Question 10

A patient is unable to detect slow changes in joint position but can sense rapid movements. Which receptor type is most likely functioning normally?

Accepted Answer

Phasic receptors

Question 11

Which of the following is a common misconception about phasic receptors?

Accepted Answer

They provide sustained responses to constant stimuli.

Question 12

A receptor that responds to the initial taste of flavorful food but adapts quickly to the taste is an example of:

Accepted Answer

Phasic receptor

Question 13

Which of the following statements is TRUE regarding the continuum of adaptation from phasic to tonic receptors?

Accepted Answer

Some receptors exhibit properties between phasic and tonic adaptation.

Question 14

Which receptor type is most likely to be involved in detecting pain from a paper cut?

Accepted Answer

Nociceptor

Question 15

A receptor that adapts slowly to changes in stimulus intensity is most likely a:

Accepted Answer

Tonic receptor

Question 16

Which of the following best explains why phasic receptors are important for detecting environmental changes?

Accepted Answer

They quickly adapt and signal only when there is a change in stimulus.

Question 17

Which of the following is NOT a function of tonic receptors?

Accepted Answer

Detecting rapid changes in the environment.

Question 18

A receptor that produces a generator potential in response to a stimulus is most likely:

Accepted Answer

Any sensory receptor.

Question 19

Which of the following best describes the role of mechanoreceptors in adaptation?

Accepted Answer

They can be either phasic or tonic depending on the type.

Question 20

A receptor that detects the sound of a ticking clock and adapts quickly is an example of:

Accepted Answer

Phasic receptor

Adaptation of Sensory Receptors: Phasic and Tonic Responses

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