Question

What does reflex arc involves. ????​

Answer 1

Answer:

Most reflex arcs involve only three neurons. The stimulus, such as a needle stick, stimulates the pain receptors of the skin, which initiate an impulse in a sensory neuron. This travels to the spinal cord where it passes, by means of a synapse, to a connecting neuron called the relay neuron situated in the spinal cord.

Answer 2

Answer:

reflex arc involves spinal cord, sensory neurones, motor neurones, effectors