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Quiz yourself on Nervous SystemGet your flashcardsBuild my revision planTrack my progress⚡ Explore: Inside a Synapse
Tap each dot to see how the chemical messenger crosses from one neurone to the next.
How a synapse works (4 steps):
- An electrical impulse arrives at the end of the first neurone (pre-synaptic neurone).
- This triggers the release of neurotransmitters from tiny vesicles into the synaptic cleft.
- The neurotransmitters diffuse across the gap and bind to specific receptor proteins on the next neurone.
- This binding triggers a new electrical impulse in the second neurone (post-synaptic neurone).
Why synapses matter: Synapses ensure signals travel in one direction only (neurotransmitters are only released from the pre-synaptic side). They also allow signals to be amplified, inhibited, or combined from multiple neurones — this is how the brain processes complex information.
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