Give the significance of reflex actions.

Explanation

### Step-by-Step Solution:

1. **Definition of Reflex Actions**: Reflex actions are involuntary and instantaneous movements that occur in response to a specific stimulus. They are automatic responses that do not require conscious thought.

2. **Mechanism of Reflex Actions**: When a stimulus (like touching a hot plate) is detected by sensory receptors in the body, sensory neurons transmit this information to the spinal cord.

3. **Role of Neurons**: Within the spinal cord, the information is processed by relay neurons, which then send signals through motor neurons to the muscles, prompting a quick response, such as pulling the hand away from the hot surface.

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