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Coordination and regulation

Coordination and regulation. The nervous system. The nervous system. The nervous system is composed of excitable cells called neurones (also neurons) Neurones, characteristically, have long thin extensions which carry electrical nerve impulses

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Coordination and regulation

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  1. Coordination and regulation The nervous system

  2. The nervous system • The nervous system is composed of excitable cells called neurones (also neurons) • Neurones, characteristically, have long thin extensions which carry electrical nerve impulses • This electrical signal of the nerve impulse needs to be converted into a chemical signal (a neurotransmitter) so that it can pass from nerve cell to nerve cell

  3. Central Nervous System Motor nerve Sensory nerve Effector eg muscle or gland Receptor or Sensor eg photoreceptor Stimulus Response The nervous system organisation • A Central Nervous System (CNS) made of the brain and spinal cord… • and peripheral nerves connecting it to sensors and effectors

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