reflex action

A reflex action is an automatic, rapid response to a specific stimulus that doesn't involve conscious thinking. When your body detects something potentially harmful or needing attention—like touching something hot or pinching your skin—nerve signals quickly send a message to your spinal cord, bypassing the brain. The spinal cord then immediately sends a command back to muscles to react—such as pulling your hand away—protecting you from injury. Reflex actions are essential for survival, providing swift responses that help prevent harm without the delay of thinking.