Question

Drag the labels onto the flowchart to indicate the sequence of events that occurs in the presynaptic cell (orange background) and the postsynaptic cell (blue background) after an action potential reaches a chemical synapse.

Answer 1

In a presynaptic membrane when the depolarization occurs

a) Ca²⁺ channels in the presynaptic membrane open briefly

b) Ca²⁺ ions enter presynaptic cell

c)neurotransmitter containing vesicles fuse with presynaptic membrane

d)neurotransmitter released into synatic cleft

e)neurotrasmitter binds to ligand-gated ion channels iin posynaptic membrane; channels open

f)neurotransmitter degrade or removed from the cleft; ligan gated ion channels close