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Motor Neurones

Motor neurones transmit impulses from either relay neurones or sensory neurones to effectors.Effectors bring about responses and are either muscles or glands.Most electrical impulses travel from receptor to sensory neurone to relay neurone to motor neurone to effector cell.Motor neurones have a long axon and many short dendrites.The motor neurones that stimulate skeletal muscles tend to be myelinated.

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Specification: AQA Biology (7402), A-level, 3.6.2.1 Nerve impulses. Topic: Neuronal Communication.

Key terms in this lesson

ATP
Adenosine triphosphate, the universal energy currency of cells, formed by adding an inorganic phosphate to ADP and hydrolysed to release energy for cellular reactions.
ATP synthase
An enzyme that spans a membrane and synthesises ATP from ADP and inorganic phosphate as protons flow through it down their concentration gradient.

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