BRAINCAKENeurotransmitters
Vesicles containing neurotransmitters are found in the swollen end of the presynaptic neurone - the synaptic knob. Large amounts of mitochondria are needed for the synthesis of neurotransmitters.
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Key terms in this lesson
- Neurone
- A specialised nerve cell adapted to transmit electrical impulses (nerve impulses) around the body.
- Action potential
- The temporary reversal of the electrical charge across an axon membrane, from about -70mV to +40mV, that occurs when a neurone is stimulated above threshold.
- Depolarisation
- A change in the potential difference across a membrane that makes the inside less negative, caused by an influx of sodium ions.
- Acetylcholine
- A neurotransmitter released at cholinergic synapses and neuromuscular junctions that causes depolarisation of the postsynaptic membrane.
More in Neuronal Communication
- The Action Potential
- Nerve Impulse
- Saltatory Conduction
- Synapses
- Transmission of Impulse across Synapse
- The Role of Synapses
- Summation
- Structural Organisation of the Nervous System
All 38 lessons in Neuronal Communication · All OCR A-level Biology topics