What are the adaptations of the presynaptic bulb?
Has many mitochondria as compounds are being moved against concentration gradients
A large amount of smooth endoplastic reticulum as the neuro transmitter needs to be packaged into vesicles.
Large number of vesicles contain acetylcholine, this is the neurotransmitter which diffuses across the synaptic cleft.
A number of voltage gated calcium channels on the cell surface membrane are present
