nervous system: pns: sensory (afferent) division

Question 1

stim receptor goes to

Answer 1

CNS

Question 2

consists of

Answer 2

receptors

first order neurons

Question 3

receptos

Answer 3

detect changes in environment

Question 4

receptors are classified by

Answer 4

location
type of stimulus received
structure of receptor (general senses only)

Question 5

receptor locations

Answer 5

exteroceptors
interoceptors
proprioceptors

Question 6

exteroceptors

Answer 6

stimulus in external environment = receptors at body surface

eg. touch, most special senses

Question 7

interoceptors

Answer 7

-stimulus in internal environment (in viscera, blood vessels) etc

Question 8

proprioceptors

Answer 8

located in joints, skeletal muscles etc
-monitor body position (stretch receptors, muscle spindles)
balance and movement

Question 9

type of stimulus received in receptors

Answer 9

• mechanoreceptors (mechanical stimuli eg. pressure, touch, hearing)
• thermoreceptors (temp)
• chemoreceptors (chemical)
• photoreceptors (light)
• nociceptors (pain)

Question 10

structure of receptor (general senses only)

Answer 10

free nerve endings

encapsulated nerve endings

Question 11

free nerve endings

Answer 11

terminal dendrites of unipolar sensory neurons

eg. pain, root hair plexus

Question 12

encapsulated nerve endings

Answer 12

terminal dendrites enclosed in CT

eg. meissner’s and pacinian corpuscles

Question 13

first order neurons

Answer 13

• unipolar neurons attached to or associated with receptor

- axon located in cranial/spinal nerves to CNS

Question 14

first order neurons cell bodies in

Answer 14

• sensory ganglia of cranial nerves

- dorsal root ganglia of spinal cord

Question 15

first order neuron axon terminal in

Answer 15

• brain nuclei

- dorsal horn of spinal cord