Circadian rhythm

Definition

Circadian rhythm is the natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours. It influences various physiological processes including hormone release, eating habits, and digestion.

5 Must Know Facts For Your Next Test

1. Circadian rhythm significantly impacts metabolism and can influence weight gain or loss.
2. Disruption of circadian rhythms, such as through shift work or irregular sleep patterns, can lead to weight management issues.
3. Certain weight management drugs may interact with the body's circadian rhythms to enhance their effectiveness.
4. Hormones regulated by circadian rhythms, like cortisol and melatonin, play a role in appetite control and energy expenditure.
5. Understanding a patient's circadian rhythm can help tailor weight management strategies for better outcomes.

Review Questions

• How does circadian rhythm affect metabolism?
• What are the consequences of disrupted circadian rhythms on weight management?
• Which hormones controlled by circadian rhythms are involved in appetite regulation?

Related terms

Metabolism:

The set of life-sustaining chemical reactions that process nutrients and convert them into energy.

Cortisol:

A hormone released by the adrenal glands that plays a role in stress response and metabolism regulation.

Melatonin: A hormone produced by the pineal gland that regulates sleep-wake cycles.