Describe how a neurotransmitter, such as acetylcholine, is released from a brain cell.

When an action potential reaches the presynaptic bouton, it causes an influx of calcium into the nerve cell ending. This, in turn, causes vesicles containing the neurotransmitter (acetylcholine) to move to and fuse with the presynaptic membrane. Fusion causes the release of acetylcholine into the synaptic cleft, where it can bind to receptors on the post-synaptic bouton. This binding causes sodium channels on the post-synaptic bouton to open, continuing the action potential.Once the reaction has finished, the bound acetylcholine is then broken down by acetylcholinesterase allowing reuptake and recycling back into the presynaptic bouton.

ZG
Answered by Zoe G. Biology tutor

2967 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What cells produce glucagon?


What enzymes are used in the process of DNA replication and what are they used for?


What is negative feedback?


What happens during prophase?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences