Sleep regulation refers to the processes that control the timing, duration, and quality of sleep. It involves various biological mechanisms, including the circadian rhythm, which is the body's internal clock that signals when to sleep and wake. Hormones like melatonin play a crucial role in promoting sleepiness, while other factors such as light exposure and daily activities can influence sleep patterns. Additionally, sleep regulation is affected by external factors, including environmental noise, temperature, and stress levels. Disruptions in sleep regulation can lead to sleep disorders, impacting overall health and well-being. Understanding these processes is essential for improving sleep quality and maintaining a healthy lifestyle.