A simple reflex action happens if we accidentally touch something hot. We rapidly move our hand away. This is called the pain withdrawal reflex. The diagram shows the reflex arc involved.

Blinking may seem like a simple automatic action but it involves a complex process that protects your eyes nourishes your ...

A reflex action follows this general sequence and does not involve the conscious part of the brain. This is why the response is so fast. Receptor in the skin detects a stimulus (the change in ...