Respuesta :
Answer:
The correct order is :
(5) Sensor Receptor.
(4) Sensory Neuron.
(2) Inter Neuron.
(1) Motor Neuron.
(3) Effector.
Explanation:
- Reflex arc can be defined as the pathway taken by an impulse which helps out body to react in response to any specific demand by the environment.
- A Reflex Action can be defined as the immediate response of the body to a sudden environmental stimulus.
- Impulses in the body are carried by means of neurons. As a reflex action demands an immediate response, so the response to these impulses are generated in the spinal cord and the impulses are not send to the brain (to save time).
- The pathway taken by an impulse is explained below:
- The Receptor organ recognises the stimulus.
- It sends the message as an impulse to the Sensory neuron.
- The Sensory neuron carries the message of the impulse to the Spinal cord.
- In the Spinal cord, there are Inter-neurons that take up the message, decides the action to be taken and sends the response to the Motor neuron.
- The Motor neuron conducts the response message from the inter-neuron to the Effector organ.
- The Effector organ gives the appropriate response.
