The Chemical Synapse
1) Nerve impulse
arrives causing
influx of Ca+2
5) Neurotransmitter is
broken down or removed
from the synapse to allow
the next transmission.
ACh-ase, MAO
Reuptake
2) Ca+2 promotes
the exocytosis of
synaptic vesicles.
3) Neurotransmitter
diffuses across the
synapse to attach
to postsynaptic
receptors.
Chemically-gated ion channels
Figure 11.18