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NERVEFIBRES AND NERVEIMPULSES
HI CENTRES AND REFLEX ACTIONS
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abnormal acid acid paper activity afferent impulses afferent nerves animal arouse behaviour blood blood-vessels body brain brain-stem breathing called carbonic acid cause cells central nervous system cerebellum cerebral cerebrum chemical co-ordinated conductivity consciousness contract depressed disease efferent neurone electric emotional end-organs energy eumetria fatigue fatty fibres flexor frog functional glands granules grey matter heart influence inhibition inhibitory innervation instance intensity internal organs irradiation irritation jerk kind large number light lower means mechanism medulla oblongata medullated mental motor centres muscles muscular tone nerve-cells nerve-centres nerve-energy nerve-fibre nerve-impulses neural neurasthenia normal origin outgoing pain path periphery person phosphorus physiological poison potential recognised reflex action reflexly resistance respiratory centre restraining result rhythm saliva secretion sensation sensori-muscular reflex sensory centres sheath skin sleep sort specialised spinal cord spinal frog stimulated substance synapses synergism thing tion tissues tonic tonus twelve a second unconscious voluntary Wallerian degeneration