the receptor molecules on the second neurone bind only to the specific neurotransmitters released from the first neurone.these chemicals diffuse across the synapse (the gap) and bind with receptor molecules on the membrane of the second neurone.this triggers the nerve-ending of a neurone to release chemical messengers called neurotransmitters.an electrical impulse travels along the first axon.Here the electrical signal must be converted into a chemical one, which is converted back to an electrical one on the other side of the synapse where the next neurone starts. Where two neurones meet there is a small gap called a synapse. These receive incoming impulses from other neurones. Tiny branches (dendrons) which branch further as dendrites at each end.They are long so they can carry messages up and down the body. A long fibre (axon) which is insulated by a fatty (myelin) sheath.They are adapted to carry electrical impulses from one place to another. effectors include muscles and glands, and so responses can include muscle contractions or hormone release.effectors bring about responses, which restore optimum levels, such as core body temperature and blood glucose levels. the coordination centre, such as the brain, spinal cord or pancreas, which receives and processes information from receptors around the body.cells called receptors, which detect stimuli. The conditions are controlled in two ways with chemical and nervous responses. The conditions inside our body must be carefully controlled if the body is to function effectively. The structure and function of the nervous system
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