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GCSE Psychology · key term
A chemical messenger that carries signals between nerve cells.
Used by AQA and OCR
Paper 2
A chemical messenger released by a neuron that crosses a synaptic cleft and binds to receptors on another cell.
Revise: Neuron Structure and FunctionWhen it reaches a terminal button, it triggers the release of neurotransmitters from small storage sacs called vesicles.
For the biological explanation, link neurotransmitter imbalance to depression rather than merely naming serotonin.
Distinguish a treatment from an explanation: improvement with an antidepressant does not prove that depression was caused solely by a neurotransmitter imbalance.
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A chemical messenger that carries signals between nerve cells. Serotonin and noradrenaline are linked to mood and emotion.
Paper 1
A chemical messenger that carries a signal across a synapse and binds to receptors on the receiving cell.
Revise: Stages of Human Development and Brain MaturationWhen an impulse reaches the sending neuron's ending, chemical messengers called neurotransmitters are released. They cross the gap and bind to matching receptors on the receiving neuron, influencing its activity. Communication therefore involves electrical signals within neurons and chemical signals between them.
A chemical messenger released by a neuron that binds to receptors on another cell.
