When a nerve impulse arrives at a synapse, it causes the release of neurotransmitter from vesicles in the presynaptic knob. Describe how.

Membrane depolarisation arrives at the pre-synpase and causes Ca2+ voltage-gated channels to open. This allows Ca2+ ions to diffuse in the presynapse via the activated Ca2+ channels. Ca2+ influx in the presynapse induces vesicles carrying the neurotransmitter to fuse with the presynaptic membrane and release their content in the synaptic knob.

GM
Answered by Georgios M. Biology tutor

7217 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What is Linkage?


How do negative and positive feedback loops occur and how are they different?


What is the structure of DNA?


Describe the process of synaptic transmission with regard to action potentials


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 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences