Reflex Action: Withdrawal of Hand while Touching a Hot Article
- A reflex action is an involuntary and automatic response to a stimulus.
- It is controlled by the spinal cord without the involvement of the brain.
- The withdrawal of the hand while touching a hot article is a classic example of a reflex action.
- Here's a detailed explanation of why it is a reflex action:
1. Sensory Receptor:
- The sensory receptors in the skin detect the heat from the hot article.
2. Sensory Neurons:
- The sensory neurons transmit the information from the sensory receptors to the spinal cord.
3. Spinal Cord:
- The spinal cord serves as the center for reflex actions.
- It receives the sensory information and immediately sends a signal to the muscles in the arm.
4. Motor Neurons:
- The motor neurons carry the signal from the spinal cord to the muscles responsible for withdrawing the hand.
5. Muscle Contraction:
- Upon receiving the signal, the muscles contract rapidly, causing the hand to be pulled away from the hot article.
6. No Involvement of the Brain:
- In this reflex action, the brain is not involved in the decision-making process.
- The signal sent by the spinal cord bypasses the brain, ensuring a quick and automatic response.
In summary, the withdrawal of the hand while touching a hot article is a reflex action because it is an involuntary and automatic response controlled by the spinal cord without the involvement of the brain.

A. correct answer