BRAINCAKEThe Nervous System
The nervous system is responsible for detecting stimuli (changes to the internal and external environment), processing the information and carrying out an appropriate response.
The nervous system is made up of billions of specialised cells called neurones.
Neurones transmit electrical signals around the body.
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Key terms in this lesson
- neurotransmitter
- A chemical released by a presynaptic neurone that diffuses across a synapse and binds to receptors on the postsynaptic cell, altering its membrane potential.
More in Neuronal Communication
- Co-ordination
- Co-ordination Systems
- Cell Signalling
- Neurones
- Sensory Neurones
- Motor Neurones
- Myelinated Neurones
- Sensory Receptors
All 38 lessons in Neuronal Communication · All AQA A-level Biology topics