Test 2 - Lecture 1 (sensory reception) Flashcards Preview

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Flashcards in Test 2 - Lecture 1 (sensory reception) Deck (40)
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1

photoreceptors

vision

2

chemoreceptors

smell/taste

3

mechanoreceptors

touch

4

nociceptors

pain

5

"the state of" implies current conditions...

both within and outside the body

6

peripheral

outside the CNS

7

stimulus

physical energy to which a particular sensory receptor will respond

8

transduction

neurochemical process through which a sensory neuron transforms the stimulus energy into a bioelectrical signal

9

bioelectrical signal

action potentials that originate from a sensory neuron

10

mechanical receptors stimulated by

pressure/sound

11

electromagnetic receptors stimulated by

radiant heat; light (retna)

12

thermal receptors stimulated by

heat

13

chemical receptors stimulated by

aciditiy; concentration

14

modality

type of stimulus

15

intensity

strength of stimulus

16

duration

span of time that stimulus is sensed

17

location

of the receptor upon or within the body, and/or the origin of the stimulus from outside the body

18

sensory receptor: sensory neuron

directly transduces the stimulus energy
(gives rise to an axon that serves as the primary sensory afferent fiber from that receptor)

19

sensory receptor: modified epithelial cell

receives the stimulus energy

20

accessory structures to a sensory receptor

enhance or focus a particular stimulus upon the receptor

21

sensory receptors transduce the " " into a coded ___________ for relay in the CNS

stimulus energy; bioelectrical signal

22

stimulus transduction starts with a

generator potential

23

generator potential

responsive depolarization of the sensory neuron's membrane

24

the greater a stimulus intensity is...

the greater the membrane change is

25

the greater the stimulus intensity is...

the greater the depolarization of sensory neuron is

26

stimulus threshold

how strong stimulus intensity is action upon a receptor

27

the greater the stimulus intensity is above threshold...

the greater the depolarization and frequency is

28

the frequency of action potentials encodes

stimulus intensity

29

the duration of the train of action potentials encodes

stimulus duration

30

recepter "adaptation"

declining generator response during a sustained stimulus