How Does A Level Biology Revision (Year 13) "Inhibitory Synapses Work?

Inhibitory synapses are like traffic lights that tell brain cells when to slow down or stop.

Imagine your brain is a busy city full of cars (nerve cells). These cars usually zoom along the roads (signals), but sometimes they need to be told to stop or slow down. That’s where inhibitory synapses come in, they act like traffic lights that say “Go slower” or “Stop completely.”

Think of it like a playground. If you're playing tag and someone shouts, “Freeze!” you stop running. Inhibitory synapses are like that shout, they send a message to the next brain cell that says, “Slow down” or “Don’t go any further.”

When a signal arrives at an inhibitory synapse, it causes a special chemical (called a neurotransmitter) to be released. This chemical attaches to the next nerve cell and makes its gate (the cell membrane) harder to open, so the signal doesn’t pass through as easily.

It’s like having a sneaky friend who pushes you from behind just as you’re about to run, they slow you down!