Question

Describe how an action potential arriving at a presynaptic membrane of a neurone can result

In the depolarisation of the membrane of a post-synaptic neurone.

Answer 1

1. action potential stimulates neighbouring area of membrane
2. Nat, moves sideways / attracted to areas at resting potential,A local circuit
3. causes, Na+ ion channels to open / 2nd depolarisation
4. (transmission) in one direction due to, hyperpolarisation / refractory period
5. myelin sheath / Schwann cell
sheath insulates, axon / dendron / neurone
6. depolarisation / action potential, only at nodes of Ranvier / unmyelinated part ora
7. saltatory conduction / action potential
'umps' from node to node