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.

Answered by Zoe G. Biology tutor

1912 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe the ways in which LDLs and HDLs affect the formation of atheromas.


How do two neurones interact at synapse?


What are three differences between DNA and RNA? ( 3 marks)


What are the four bases found in DNA and how do they bond.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy