autonomic nervous system

Question 1

synaptic transmission

Answer 1

1. action potential invades pre synaptic terminal
2. depolarisation opens ca2+ channels
3. Ca2+ rise triggers vesicle release
4. transmitter diffuse across the synaptic cleft to post synaptic receptor
5. nicotinic ACh receptor activation depolarises membrane
6. post synaptic potential triggers new action potential
7. signalling is turned off by transmitter removal (acetylcholinestrase)