What is reflex arc? Biology CIE O Level
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The reflex arc is a reflex action. Reflex means it is automatically done without your choice. This is because when the electrical impulses reach the relay neurone........!!!!
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A reflex arc is the shortest pathway by which nerve impulses travel from the receptor to the effector in a reflex action.
Reflex action ; an immediate response to aspecific stimulus without conscious control
Receptors ; sense organs that receive stimuli
Effectors ; an organ or cell that acts in response to a stimulus e.g muscles
Hope this helps :)
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