BRAINCAKECo-ordination Systems
There are two main co-ordination systems which interact and work together:
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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.
- neuromuscular junction
- The synapse between a motor neurone and a skeletal muscle fibre, where acetylcholine triggers depolarisation of the sarcolemma.
- hormone
- A chemical messenger, secreted by an endocrine gland directly into the blood, that travels to target cells bearing complementary receptors and brings about a response.
- insulin
- A hormone secreted by the beta cells of the islets of Langerhans in response to a rise in blood glucose concentration, which lowers blood glucose by stimulating cells to take up and use or store glucose.
More in Neuronal Communication
- Co-ordination
- Cell Signalling
- The Nervous System
- Neurones
- Sensory Neurones
- Motor Neurones
- Myelinated Neurones
- Sensory Receptors
All 38 lessons in Neuronal Communication · All AQA A-level Biology topics