Synaptic Transmission

Question 1

How does an action potential trigger neurotransmitter release?

Answer 1

Voltage gated Ca2+ channels open
Ca2+ enters, triggering vesicles to release neurotransmitters into synaptic cleft
Neurotransmitters binds to receptors on the postsynaptic neuron

Question 2

What are three ways neurotransmitters are removed from. The synapse

Answer 2

Diffusion away
Enzyme breakdown
Reuptake into the presynaptic neuron