NS 13 - thermoreception

Question 1

what is thermoreception?

Answer 1

detection of non-noxiuos temp changes

Question 2

what is the sensory result of thermoreception?

Answer 2

warm and cold sensation

Question 3

what is the non-sensory result of thermoreception?

Answer 3

reflexes

Question 4

is there a cold bias in the mouth?

Answer 4

5-10x more cold spots than hot spots

Question 5

what is the major difference between thermoreception and nociception?

Answer 5

thermoreception has minimal modification at the first synapse whereas nociception has a significant modification at the first synapse

Question 6

what are the similarites between thermoreception and nociception?

Answer 6

peripheral nerves

• free nerve endings
• Adelta and C fibres

central pathway
- 1st synapse in V nucleus caudalis (or spinal dorsal horn)

Question 7

what are the dynamic properties of a warm receptor?

Answer 7

warming - increase frequency of AP

cooling - transient inhibition

Question 8

what are the dynamic properties of the cold receptor?

Answer 8

warming - transient inhibition

cooling - increase frequency of AP

Question 9

describe thermal transduction?

Answer 9

temperature causes membrane permeability change - receptor