ch. 15 17 Flashcards Preview

anatomy and physiology > ch. 15 17 > Flashcards

Flashcards in ch. 15 17 Deck (143)
Loading flashcards...
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

what type of tract carries motor info to the brain

motor/efferent pathways