Ch 8 - Synaptic Transmission Flashcards Preview

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Flashcards in Ch 8 - Synaptic Transmission Deck (35):
0

space between postsynaptic cell and presynaptic cell

synapse (apposition zone)

1

patch clamp blank current flow from one channel at a time, but voltage clamp causes a blank voltage

measures, fixed

2

not all channels will blank at certain voltages

open

3

current flows blank in a current generator

outward

4

feedback amplifier injects a blank current into the cell to keep it at a fixed voltage

equal and opposite

5

voltage clamp works as a blank system

negative feedback

6

synapses that send rapid and stereotyped depolarizing signals

electrical

7

electrical synapses are good for depolarizing blank neurons simultaneously

multiple

8

type of synapse that are more flexible, slower, and more variability in types of signals that can be sent

chemical

9

chemical synapses can produce more blank behaviors

complex

10

the postsynaptic cell receives about blank percent of the signal that the presynaptic cell has

50%

11

synaptic delay between presynaptic spike and postsynaptic spike is almost blank because gap junctions are blank

instantaneous, physically connected

12

electrical gap junctions passively spread blank without a blank

graded signal, action potential

13

gap junctions are covered with specialized channels that allow current to go through called

gap junction channels

14

postsynaptic cytoplasm of gap junctions are much blank than normal extracellular space

smaller

15

these close to cut themselves off from a dying cell so they dont die too

connexin

16

gap junctions have blank blank channels

hemi

17

electrical synapses are useful for orchestrating the action of blank

many cells at once,

18

electric current required to stimulate multiple cells is greater than electric current required to stimulate blank

one cell

19

electrical synapses do not have blank channels that only allows certain things to pass through

selective

20

support cells of the nervous system (CNS & PNS)

glial

21

look at slides for this chapter

ok

22

electrical synapses are used mostly in blank

lower invertebrates

23

humans use blank synapses mostly

chemical

24

chemical messengers from one cell to another in chemical synapses

neurotransmitters

25

chemical synapses hold neurotransmitter blank is specific places that is directly across from blank

vesicles, receptor of postsynaptic neuron

26

vesicles are released via

exocytosis

27

neurotransmitters are made of blank and blank

amino acids/peptides

28

transmitter is released in blank step, then in second step, neurotransmitters bind to blank and cause a change

1st, receptors

29

advantages of multiple receptors rather than neurotransmitters

1. multiple receptors with slight protein variations
2. ability to reuse the neurotransmitter
3. can change how many receptors are available
4. easier to store a few neurotransmitters
5. secondary messengers can change the message
6. 500 types of subunits

30

ionotropic receptors have blank

membrane spanning proteins with extracellular areas that bind nt, carry out effector function in cell

31

receptors that gate ion channels directly (aka ligand channels)

ionotropic receptor

32

smaller receptors than ionotropic that are usually only consist of a couple subunits

metabotropic

33

metabotropic receptors alter somethign on the blank of the cell

inside

34

g protein coupled receptor is a blank channel

metabotropic