SQA National 5 Biology Practice Exam 2025 – Complete Study Resource

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What is the name of the gap between two neurons?

Synapse

The gap between two neurons is known as a synapse. This crucial structure plays a significant role in the transmission of nerve impulses. When an electrical signal travels down the axon of the presynaptic neuron, it reaches the synapse, where neurotransmitters are released. These chemicals then cross the synaptic gap and bind to receptors on the postsynaptic neuron, thus enabling communication between the two neurons.

While dendrites and axons are important components of neurons—the dendrites being the branch-like structures that receive signals and the axon being the long projection that transmits impulses—neither of these terms refers specifically to the gap. The term "neuron junction" is not a standard term used in biology to describe this gap and does not accurately capture the function or structure involved in neuronal communication.

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Dendrite

Axon

Neuron junction

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