How do synapses transmit signals?
A synapse is a junction where a neuron transfers information to another cell electrically or chemically.
Biological mechanism and regulation
At a chemical synapse, calcium entry triggers neurotransmitter release and the messenger changes receptors on the next cell. Responses may excite or inhibit.
Evidence, applications and limits
Electrical synapses can pass ions directly. Synaptic strength changes with learning, and assigning behavior to one neurotransmitter is an oversimplification. No single molecule or measurement explains the whole system; cell type, timing, environment and feedback must be considered together.
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