synaptic transmission

Question 1

process

Answer 1

1/ axon fires electrical impulse
2/ vesicles are pushed to the pre synaptic terminal
3/ neurotransmitters from within are released into the synaptic cleft where they diffuse (chemical)
4/ they bind onto receptor sites on the post synaptic membrane
5/ the impulse becomes electric again and moves down the dendrite
6/ summation:
- inhibitory (serotonin); -ve charge so decreases likelihood of firing impulse onto next neuron
- excitatory (adrenaline); +ve charge so increases likelihood of firing impule onto next neuron