Sensory Receptors + Function

Question 0

What type if somatosensory receptor detects vibration?

Answer 0

Pacinian corpuscle

Question 1

Somatosensory system responds to external or internal stumuli?

Answer 1

External

Question 2

What type of sensory skin receptor contains collagen (and makes up 20% of receptors) ?

Answer 2

Ruffini’s corpuscle

Question 3

Large diameter and rapidly conducting afferents (group I and group II) are associate with what type of receptors?

Answer 3

Low threshold mechanoreceptors

Question 4

Small diameter, slow conducting afferents (groups III + IV (C)) are associated with what type of receptors?

Answer 4

Nociceptors an thermoreceptors

Question 5

The 3 steps in the mechanosensory pathway are…?

Answer 5

1st order neurone: primary afferents to dorsal horn
2nd order neurone: central neurone to THALAMUS
3rd order neurone: central neurone to PRIMARY SOMATOSENSORY CORTEX

Question 6

Where does nociceptive info synapse?

Answer 6

Dorsal horn

Question 7

Where does mechanoreceptor info synapse?

Answer 7

Dorsal column nuclei

Question 8

Sensory info passes from primary somatosensory cortex to…?

Answer 8

Association cortex

Question 9

Pain and temperature pathways are ______ pathways?

Answer 9

Contralateral

Question 10

Painful stimuli occurs in free nerve endings of what fibres?

Answer 10

C fibres

A delta fibres

Question 11

What peptide released by pain afferents increases the inflammatory response?

Answer 11

Substance P