Synapse - GCSE Biology Definition

A synapse is a small gap between two neurones in the brain, spinal cord, or other parts of the nervous system. It is where information is passed from one neurone to another, allowing them to communicate. When a nerve signal reaches the end of a neurone, it causes the release of chemicals called neurotransmitters into the synapse. These neurotransmitters cross the gap and bind to receptors on the next neurone, passing the signal along. This process is essential for actions like movement, sensation, and thinking, as it allows the brain and nerves to send and receive messages.