conduction

Question 1

conduction is the

Answer 1

movement of the nerve impulse along the neurone/nerve

Question 2

membrane becomes depolarised in a continuos conduction away from the cell body down the axon
in one direction only

Answer 2

unmyelinated neuron/nerve

Question 3

at nodes of ranvier there are high concentrations of Na+ gates - current appears to jump from node to node
‘leaps’ cover long intervals - much faster current
vital for rapid response reactions (reflexes)

Answer 3

myelinated neuron/nerve

Question 4

current jumping between nodes of ranvier is

Answer 4

saltatory conduction

Question 5

speed of conduction - the thicker the nerve the

Answer 5

faster

Question 6

movements slower/faster at lower temperatures

Answer 6

slower

Question 7

unmyelinated
step by step depolarisation spread
far slower
less energy efficient

Answer 7

continous conduction

Question 8

myelinated
leaps of depolarisation
far faster
more energy efficient

Answer 8

saltatory conduction

Question 9

how do local anaesthetics work

Answer 9

block the na+ gates from opening
stops an action potential from being formed
inhibits nerve from being able to transmit pain message