Flashcards in ch. 15 17 Deck (143)
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1
2 major types of receptors
general senses
special senses
2
temp, pain, touch, pressure, vibration,and proprioception (body position)
general senses
3
where is info from the general senses sent to
primary sensory cortex
4
where is info from the special senses sent to
specific areas of cortex
5
reduction in sensitivity in the presence of a constant (and painless) stimulus
sensory adaptation
6
ex of sensory adaptation
hot bath water
room with strong odor
7
2 processes of adaptation
peripheral adaptation
central adaptation
8
level of receptor activity changes- strong responses at first and it gradually declines;
reduced the amount of info that reaches CNS
peripheral adaptation
9
involves inhabitation of responses within CNS
central adaptation
10
how can the higher centers alter receptor sensitivity
ex you focus on the sense- heightens awareness "listen carefully"
11
why is the difference between somatic and visceral receptor
location
12
4 types of general sense receptors
thermoreceptors
nociceptors
mechanoreceptors
chemoreceptors
13
receptor for temp
thermoreceptors
14
receptor for pain
nociceptors
15
receptor for physical distortion
mechanoreceptors
16
receptor for chemical concentration
chemoreceptor
17
located in dermis, skeletal muscles, liver and hypothalamus
thermoreceptors
18
where are temp sensations sent to in the brain
reticular formation and thalamus
19
function of nociceptors
protective function
20
nociceptors are sensitive to what 3 items
temp extremes
mechanical damage
dissolved chemicals
21
2 types of axons that carry painful sensations
fase pain (quickly reach primary sensory cortex- quick conscious attention)
slow pain (burning and aching pain- cause generalized activation of reticular formation and thalamus)
22
nociceptor adaptation
little/no peripheral adaptation
central adaptation may decrease perception of pain
23
2 chemicals released by the cns in response to excessive pain
enkephalins and endorphins
24
3 type of machanoreceptors
tactile receptors
baroreceptors
proprioceptors
25
detect touch, pressure, and vibration
tactile receptors
26
detect pressure changes in b.v. and in portions of digestive, respiratory and urinary tracts
baroreceptors
27
monitor position of joints, tension in tendons and ligaments and the state of muscular contraction
proprioceptors
28
ex of chemoreceptors in the body
pH and CO2 monitored in CSF
29
what type of tract carries sensory info to the brain
sensory/afferent pathways
30