intro to neurones, nerve conduction and synaptic transmission Flashcards Preview

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Flashcards in intro to neurones, nerve conduction and synaptic transmission Deck (18):
1

receives input from other neurones and convey graded electrical activity signals passively to the soma

what part of the neurone is this?

dendrites

2

metabolic part of neurone. contains nucleus, mitochondria etc. Integrates incoming signals which are then conducted passively to the axon hillock.

soma (cell body)

3

site of initiation of the " all or nothing" action potential

axon hillock

4

conducts output signal as action potential to other neurones

axon

5

site of communication between neurones

synapse

6

neurone with 1 neurtie?

unipolar

7

neurone with 1 neurite that splits

pseudounipolar

8

neurone with 2 neurites

bipolar

9

neurone with 3 or more neurites

multipolar

10

in an action potential in neurones, what channels open in the upstroke part?

na+ CHANNELS

11

in an action potential in neurones , what channels open during the downstroke?

K+ channels

12

what does myelin do?

makes conduction faster

13

what is saltatory conduction?

when an action potential jumps from one of Node or Ranvier to the next in myelinated axons

14

name 3 types of synapse?

axodendritic
axosomatic
axoaxonic

15

what separates the pre and post synaptic membranes?

synaptic cleft

16

where is the neurotransmitter stored?

in the vesicles

17

many inputs converge upon a neurone to determine output

spatial summation

18

a single output may modulate output by variation in action potential frequency

temporal summation