Q: Which equation best represents the relationship between stimulus intensity and receptor potential magnitude?

$V_{RP} = k \times S_{intensity}$

Question 1

Which type of sensory receptor is primarily responsible for detecting steady pressure and texture on the skin?

Accepted Answer

Merkel receptors

Question 2

A patient presents with an inability to distinguish between two closely spaced points on their skin. Which concept is most directly related to this deficit?

Accepted Answer

Receptive field size

Question 3

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

Accepted Answer

Conversion of a physical stimulus into an electrical signal

Question 4

Which equation best represents the relationship between stimulus intensity and receptor potential magnitude?

Accepted Answer

$V_{RP} = k 	imes S_{intensity}$

Question 5

Which sensory receptor type is most likely to be activated by tissue-damaging stimuli such as extreme heat or pressure?

Accepted Answer

Nociceptors

Question 6

A rapidly adapting receptor responds quickly to a stimulus but then stops firing even if the stimulus continues. Which real-life example best illustrates this property?

Accepted Answer

Noticing a strong perfume when you first enter a room, but not after a few minutes

Question 7

Which of the following is NOT a modality detected by sensory receptors?

Accepted Answer

Blood glucose concentration

Question 8

A stimulus must reach a certain minimum strength to be detected by a sensory receptor. What is this minimum strength called?

Accepted Answer

Threshold

Question 9

Which of the following mechanisms enhances the brain's ability to localize a stimulus by increasing contrast between the center and edges of a stimulated region?

Accepted Answer

Lateral inhibition

Question 10

If a weak stimulus activates only a single sensory unit, but a strong stimulus activates multiple sensory units, which concept does this illustrate?

Accepted Answer

Population coding

Question 11

Which type of receptor is responsible for detecting changes in temperature?

Accepted Answer

Thermoreceptors

Question 12

A patient with damage to their Meissner's corpuscles would most likely have difficulty detecting which type of sensation?

Accepted Answer

Fine touch and vibration

Question 13

Which of the following best explains why pain from internal organs is often poorly localized compared to pain from the skin?

Accepted Answer

Visceral organs have fewer pain fibers and larger receptive fields

Question 14

Which equation best represents the relationship between the frequency of action potentials ($f_{AP}$) and stimulus intensity ($I_{stim}$)?

Accepted Answer

$f_{AP} = k 	imes I_{stim}$

Question 15

Which sensory receptor type is most likely to be activated by airborne chemicals?

Accepted Answer

Chemoreceptors

Question 16

Which of the following is a graded potential created by sensory receptors?

Accepted Answer

Receptor potential

Question 17

A person is able to detect the color of an object in bright sunlight. Which type of receptor is primarily responsible for this function?

Accepted Answer

Cones

Question 18

Which of the following best describes the adequate stimulus for a photoreceptor?

Accepted Answer

Wavelengths of light

Question 19

Which process allows the CNS to ignore certain sensory information, such as background noise, so that it does not reach conscious perception?

Accepted Answer

Inhibitory modulation

Question 20

Which of the following is true regarding the coding of stimulus location in the somatosensory system?

Accepted Answer

It is determined by the overlap and size of receptive fields

Chapter 10: Sensory Physiology – Structure and Function of Sensory Systems

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