Here's why:
* Sensory neurons receive information from the environment (like touch, sight, sound) and transmit it to the central nervous system (brain and spinal cord).
* Motor neurons receive signals from the central nervous system and transmit them to muscles or glands, causing an action.
* Interneurons act as intermediaries between sensory and motor neurons. They process the information received from the sensory neurons and decide how to respond.
Important note: Interneurons are not always involved in the simple reflex arc. For example, the knee-jerk reflex involves only a sensory neuron and a motor neuron, without an interneuron. However, in most complex actions, interneurons play a crucial role in coordinating the response.
