Neurobiology and behaviour
■ Specialised cells called neurones, such as the motor neurone and others, are assembled to form the nervous system.
■ The mammalian nervous system consists of a brain and spinal cord (central nervous system, CNS) and nerves serving the tissues and organs of the body (peripheral nervous system, PNS).
■ The nervous system links receptors (e.g. sense organs) to effectors (muscles or glands). ■ An impulse or action potential is a temporary reversal of the electrical potential difference that is maintained across the membrane of the nerve fibres. Conduction of an action potential is extremely fast.
■ Action potentials are transmitted between neurones across tiny gaps at synapses. Transmission here is chemical, involving diffusion of a specific transmitter substance.
- Created by: Jannicke Sahl
- Created on: 15-05-12 21:26
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