Involuntary responses are automatic reactions of the body that occur without conscious thought. These responses are often triggered by specific stimuli and are essential for survival. For example, when touching something hot, the body quickly pulls away to prevent injury, demonstrating a reflex action. These responses are controlled by the nervous system, particularly the autonomic nervous system, which manages functions like heart rate and digestion. Involuntary responses can also include actions like blinking or breathing, which happen automatically to protect the body and maintain essential functions without requiring deliberate effort.