How is a reflex arc formed?

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(B) reflex arc is formed by the pathway taken by nerve impulses in a reflex action.- It consists of at least one afferent neuron (receptor) and one ef

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By the pathway of nerve impulses during a reflex action.

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(B) reflex arc is formed by the pathway taken by nerve impulses in a reflex action.- It consists of at least one afferent neuron (receptor) and one efferent (effector) neuron appropriately arranged in a series.- The afferent neuron receives the signal from a sensory organ and transmits the impulse via a dorsal nerve root into the $CNS$ (at the level of the spinal cord).- The efferent neuron then carries signals from the $CNS$ to the effector (muscle or gland).- The stimulus and response,thus,form a reflex arc,as seen in the knee-jerk reflex.

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