Reflex actions are automatic responses to specific stimuli that occur without conscious thought. They are designed to protect the body from harm and help maintain homeostasis. For example, when you touch something hot, your body quickly pulls away before you even realize it, preventing burns. These actions are controlled by the nervous system, specifically through a pathway called a reflex arc. A reflex arc involves sensory neurons that detect the stimulus, interneurons that process the information, and motor neurons that trigger the response. This rapid communication allows for quick reactions, ensuring safety and efficiency in bodily functions.