The Role of Circadian Rhythms in Human Health

Understanding Circadian Rhythms

Circadian rhythms are the natural processes that regulate our sleep-wake cycle and repeat roughly every 24 hours. These rhythms are influenced by external cues like light and temperature.

A key example is the hormone melatonin, which is crucial for sleep. As it gets dark, melatonin levels rise, signaling our bodies to prepare for sleep. Conversely, exposure to morning light decreases melatonin, helping us wake up.

Disruption of circadian rhythms, such as through shift work or excessive screen time before bed, can lead to health issues like sleep disorders and decreased cognitive function. Understanding and maintaining these rhythms is essential for overall well-being.

Key Points

Circadian rhythms regulate the sleep-wake cycle, influenced by light and temperature. Melatonin plays a vital role in signaling sleep. Disruptions can cause health issues like sleep disorders and impaired cognition.

Sample Answer

The lecture discusses circadian rhythms, which are natural cycles that manage our sleep-wake patterns. These rhythms are affected by external factors, primarily light. For instance, the hormone melatonin increases when it gets dark, promoting sleep, and decreases with morning light, aiding wakefulness.

The professor explains that disruptions to these rhythms, such as from shift work or late-night screen use, can lead to problems like sleep disorders and reduced cognitive abilities. In conclusion, understanding circadian rhythms and keeping them stable is crucial for our health and daily functioning.