A simple reflex arc follows which pathway?

The pathway of a simple reflex arc is correctly represented by the sequence of sense organ, nerve, spinal ganglion, and spinal cord. This process starts when a sensory receptor detects a stimulus, sending a signal through sensory neurons (the nerves). These signals first travel to the spinal ganglion, which acts as a relay station for the incoming sensory information. From there, the signals are transmitted to the spinal cord, where a reflexive action occurs, often without the need for processing by the brain.

This pathway is essential for rapid responses to stimuli, as it allows the body to react quickly without involving higher brain functions, thus minimizing reaction time. The other options describe different processes or include unnecessary steps that do not accurately reflect the rapid and direct sequencing involved in a simple reflex arc, thereby highlighting the uniqueness and efficiency of option B in representing the correct canonical pathway of a simple reflex action.