intro to neurones, nerve conduction and synaptic transmission

Question 1

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

what part of the neurone is this?

Answer 1

dendrites

Question 2

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

Answer 2

soma (cell body)

Question 3

site of initiation of the “ all or nothing” action potential

Answer 3

axon hillock

Question 4

conducts output signal as action potential to other neurones

Answer 4

axon

Question 5

site of communication between neurones

Answer 5

synapse

Question 6

neurone with 1 neurtie?

Answer 6

unipolar

Question 7

neurone with 1 neurite that splits

Answer 7

pseudounipolar

Question 8

neurone with 2 neurites

Answer 8

bipolar

Question 9

neurone with 3 or more neurites

Answer 9

multipolar

Question 10

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

Answer 10

na+ CHANNELS

Question 11

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

Answer 11

K+ channels

Question 12

what does myelin do?

Answer 12

makes conduction faster

Question 13

what is saltatory conduction?

Answer 13

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

Question 14

name 3 types of synapse?

Answer 14

axodendritic
axosomatic
axoaxonic

Question 15

what separates the pre and post synaptic membranes?

Answer 15

synaptic cleft

Question 16

where is the neurotransmitter stored?

Answer 16

in the vesicles

Question 17

many inputs converge upon a neurone to determine output

Answer 17

spatial summation

Question 18

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

Answer 18

temporal summation