Question 1

Which of the following best describes the function of proprioceptors in the human body?

Accepted Answer

They monitor the position and movement of skeletal muscles and joints.

Question 2

A patient is unable to distinguish between two closely spaced points on their forearm, but can do so easily on their fingertip. This difference is primarily due to:

Accepted Answer

A higher density of mechanoreceptors in the fingertip.

Question 3

Which receptor type is most likely to be activated when you step into a hot bath?

Accepted Answer

Thermoreceptors

Question 4

The Lamellar (Pacinian) corpuscle is specialized for detecting which type of stimulus?

Accepted Answer

Deep pressure and vibration

Question 5

Which of the following best explains why tonic receptors are important for maintaining posture?

Accepted Answer

They continue to generate action potentials as long as the stimulus is present.

Question 6

A person is exposed to a strong odor, but after a few minutes, they no longer notice it. This phenomenon is best explained by:

Accepted Answer

The action of phasic receptors adapting to the stimulus.

Question 7

Which of the following equations best represents the relationship between stimulus intensity ($$I) $$and receptor potential ($$V) in a $$typical mechanoreceptor, assuming a linear response?

Accepted Answer

$$V = kI$$

Question 8

Baroreceptors play a critical role in which physiological process?

Accepted Answer

Regulation of blood pressure by detecting changes in vessel wall stretch.

Question 9

A patient with damage to their muscle spindles would most likely experience difficulty with:

Accepted Answer

Detecting changes in muscle length and maintaining muscle tone.

Question 10

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

Accepted Answer

Phasic receptors adapt quickly to a constant stimulus, while tonic receptors adapt slowly or not at all.

Question 11

During a two-point discrimination test, which factor most directly determines the minimum distance at which two points are perceived as separate?

Accepted Answer

The density of tactile (Meissner's) corpuscles in the tested area.

Question 12

Which scenario best illustrates the function of a chemoreceptor?

Accepted Answer

Detecting increased carbon dioxide levels in the blood.

Question 13

If a person has a mutation that causes their stretch receptors to be nonfunctional, which of the following would most likely be impaired?

Accepted Answer

Their ability to detect changes in muscle length during movement.

Question 14

Which of the following is a correct example of a mechanoreceptor and its function?

Accepted Answer

Tactile (Meissner's) corpuscle: detects light touch and texture.

Question 15

A researcher is studying the adaptation rates of different sensory receptors. Which of the following would most likely show a rapid decrease in response to a constant stimulus?

Accepted Answer

Phasic receptors

Question 16

Which of the following best explains why you can feel the difference between a light touch and a firm press on your skin?

Accepted Answer

Different mechanoreceptors are activated depending on the intensity of the stimulus.

Question 17

A person is able to maintain balance even with their eyes closed. Which receptor type is most responsible for this ability?

Accepted Answer

Proprioceptors

Question 18

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

Accepted Answer

A decrease in receptor response to a constant stimulus over time.

Question 19

If the threshold for two-point discrimination on the back is 40 mm and on the fingertip is 2 mm, what is the ratio of tactile acuity between the fingertip and the back?

Accepted Answer

$$\frac{40}{2} = 20$$

Question 20

Which of the following is most likely to be true if a person has a deficiency in tactile (Meissner's) corpuscles?

Accepted Answer

They would have reduced sensitivity to light touch and texture.

General Sensory Receptors and Sensory Adaptation: Lab Practical Review Notes

Guida di studio - Domande di pratica

Study guide - Flashcard