Reflex actions

Reflex actions are automatic and quick responses to specific stimuli that do not require conscious thought. When a sensory nerve detects a stimulus, like touching something hot, it sends a signal to the spinal cord, which immediately sends a signal back to the muscles to respond, bypassing the brain for a faster reaction. This process helps protect the body from harm. Common examples include pulling your hand away from a hot surface or the knee-jerk reaction during a physical exam. Reflex actions are crucial for survival, allowing rapid responses to potentially dangerous situations.