Describe how a nerve impulse travels from neurone A to neurone B.

As an action potential arrives at A (the presynaptic terminal), pre-formed vesicles containing a chemical neurotransmitter fuse with the presynaptic membrane, releasing the chemical neurotransmitter into the synaptic cleft. The neurotransmitter molecules then diffuse across the synaptic cleft and bind to receptors on neuron B, at the postsynaptic membrane. If the concentration of neurotransmitters reaching B is sufficiently high (above the threshold), an electrical impulse will be generated in neuron B.

Answered by Medani E. Biology tutor

1882 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What is the difference between meiosis and mitosis?


What are two ways which the body cools itself down when too hot?


Occasionally a baby can be born with a hole in the wall that separates the left and right ventricles of the heart. Using your knowledge of blood circulation, explain the consequences of this condition.


Explain what happens to plant shoots when sunlight only reaches one side of the tip


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
Cookie Preferences