Withdrawal reflexes are automatic responses that occur when the body senses potential harm. For example, if you touch something hot, sensory neurons send signals to the spinal cord, which quickly activates motor neurons to pull your hand away. This process happens without involving the brain, allowing for a faster reaction to prevent injury. These reflexes are essential for survival, as they help protect the body from dangerous stimuli. The withdrawal reflex is part of the nervous system and demonstrates how the body can respond rapidly to threats, ensuring safety and minimizing damage from harmful situations.