PNS

Question 1

What are peripheral sensory receptors?

Answer 1

structures that pick up sensory stimuli

-initiate signals in sensory axons

Question 2

How are sensory receptors classified?

Answer 2

location

type of stimulus detected

Question 3

Exteroceptors

Answer 3

sensitive to stimuli arising from outside the body

• located near body surface
• touch, pain, pressures, temp, special sense organs

Question 4

Interceptors (visceroceptors)

Answer 4

receive stimuli from internal viscera

• temp, taste, stretching of tissue
• visceral pain, nausea, hunger, fullness

Question 5

Proprioceptors

Answer 5

monitor degree of stretch

-located in musculoskeletal organs

Question 6

Mechanoreceptors

Answer 6

respond to mechanical forces

-touch, pressure, stretch, vibrations

Question 7

Thermoreceptors

Answer 7

temp changes

Question 8

Chemoreceptors

Answer 8

chemicals in solutions

Question 9

Photoreceptors

Answer 9

respond to light

Question 10

Nociceptors

Answer 10

respond to harmful stimuli that result in pain and damage to tissue

Question 11

How many pairs of spinal nerves are there?

Answer 11

31

Question 12

Spinal cords arise as a series of _______

Answer 12

small rootlets

Question 13

Dorsal root? Ventral root?

Answer 13

DR- sensory nerve fibres

VR- motor nerve fibres

Question 14

Dorsal/ ventral ramus

Answer 14

contain motor and sensory nerve fibres