Which of the following is the correct pathway of nerve impulse?

Explanation

A receptor detects the stimulus, a sensory neurone carries the impulse into the central nervous system, and a motor neurone carries the instruction out to the effector that responds. The direction is fixed by the one way nature of the synapse, since transmitter is released on one side only and receptors sit on the other. Any pathway beginning at the effector reverses the whole logic of the reflex.