what is reflex arc why do impulse flow only in one direction in a reflex arc
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The path of flow of electric impulses in a way to response to a sudden stimuli is known as a Reflex Arc.
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Reflex arc is a neural pathway that controls the reflex action. It is a pathway followed by nerves which carry sensory from the receptor to spinal chord and then carry the response of the spinal chord to the effector organs during a reflex action.
Nerve cells have neurotransmitter storage vesicles going only in one direction and the receptors are in only one place. Therefore, the nerve impulses cannot move in opposite directions.
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