synaptic transmission

Question 1

Blinking involves cholinergic synapses. Anaesthetic S is a similar shape to acetylcholine.
Suggest how anaesthetic S stops the transmission across the synapse.

Answer 1

Complementary to receptor for acetylcholine;
2. Binds to receptor;
3. On postsynaptic (membrane);
4. Prevents acetylcholine from binding;
5. No action potential in postsynaptic neurone;

Question 2

It is important that a neurotransmitter such as serotonin is transported back out of
synapses. Explain why

Answer 2

(If not removed) keeps binding (to receptors);
2. Keeps causing action potentials /