Thursday, 9 February 2012

2.85

describe the structure and functioning of a simple reflex arc illustrated by the withdrawalof a finger from a hot object


reflexes happen very fast so you dont harm yourself
reflex arc = the pathway to an impulse along the neurons


stimulus: hot object


receptor: skin


coordinator: brain (hypothalamus) 


effector: muscles in hand


response: hand pulls away from/drops hot object

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