Question 1

Which of the following best describes 'punctate distribution' in sensory receptors?

Accepted Answer

Uneven distribution of receptors, resulting in areas of high and low sensitivity.

Question 2

A patient is unable to distinguish between two points touched closely together on their back, but can easily do so on their fingertips. Which concept explains this difference?

Accepted Answer

Punctate distribution

Question 3

Which type of receptor is primarily responsible for detecting muscle stretch and body position?

Accepted Answer

Proprioceptors

Question 4

Which of the following statements about adaptation is TRUE?

Accepted Answer

Adaptation leads to a reduction in sensitivity to a constant stimulus.

Question 5

A person places their hand on a table and feels sustained pressure. After a few minutes, they no longer notice the pressure. Which process is responsible for this?

Accepted Answer

Adaptation

Question 6

Which receptor type is LEAST likely to adapt to a constant stimulus?

Accepted Answer

Nociceptors

Question 7

Which of the following is a correct pairing of receptor type and stimulus?

Accepted Answer

Chemoreceptors – detect chemical concentration changes

Question 8

A patient presents with loss of pain and temperature sensation on the right side of their body. Which tract is most likely damaged?

Accepted Answer

Lateral spinothalamic tract

Question 9

Which of the following correctly describes the pathway for discriminative touch from the hand to the brain?

Accepted Answer

Afferent neuron ascends in the posterior columns to the medulla, crosses over, then projects to the thalamus and postcentral gyrus.

Question 10

Which receptor is responsible for detecting deep pressure and high-frequency vibration?

Accepted Answer

Pacinian (lamellated) corpuscle

Question 11

Which equation best represents the relationship between stimulus intensity ($$I) $$and frequency of action potentials ($$f) in a $$sensory neuron, assuming a linear response?

Accepted Answer

$$f = kI$$

Question 12

Which of the following is TRUE regarding the lateral corticospinal tract?

Accepted Answer

It consists of upper motor neurons that cross over at the pyramids of the medulla oblongata.

Question 13

A patient has spastic paralysis after a stroke. Which neuron is most likely damaged?

Accepted Answer

Upper motor neuron

Question 14

Which of the following is a function of the indirect (extrapyramidal) motor pathway?

Accepted Answer

Regulating muscle tone and ensuring appropriate movement

Question 15

Which receptor type is most likely to be activated when you taste something sour?

Accepted Answer

Chemoreceptors

Question 16

Which of the following best explains why nociceptors do not adapt well to constant stimulation?

Accepted Answer

Pain signals are essential for survival and must remain detectable.

Question 17

Which of the following is TRUE about thermoreceptors?

Accepted Answer

They are fast-adapting phasic receptors.

Question 18

Which pathway is responsible for transmitting crude touch and pressure sensations?

Accepted Answer

Anterior spinothalamic tract

Question 19

Which of the following correctly matches the receptor and its adaptation rate?

Accepted Answer

Merkel disc – slow adapting

Question 20

A person is unable to sense the position of their limbs after a spinal cord injury. Which receptors and pathway are most likely affected?

Accepted Answer

Proprioceptors and posterior columns

Neural Integration: Sensory Receptors and Pathways

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