The concept of 'circadian rhythm' refers to the internal biological clock that regulates the sleep-wake cycle and other physiological processes over a 24-hour period. Recent research has revealed that this rhythm is not solely controlled by the suprachiasmatic nucleus in the brain, but also by peripheral clocks in organs such as the liver and muscles. These peripheral clocks can be influenced by feeding patterns, exercise, and temperature, independent of light cues. Disruption of circadian rhythms, often caused by shift work or jet lag, has been linked to metabolic disorders, cardiovascular diseases, and even cognitive decline. Understanding the interplay between central and peripheral clocks is crucial for developing interventions to mitigate these health risks.
❓ 根据文章内容，关于昼夜节律，以下哪项陈述是正确的？
A. A. 它们完全由大脑中的视交叉上核调控。
B. B. 外周时钟不受进食和温度等外部因素的影响。
C. C. 昼夜节律的紊乱可能导致代谢和心血管问题。
D. D. 光是唯一影响所有生物钟的环境线索。
✅ 正确答案
C. Disruptions in circadian rhythms may contribute to metabolic and cardiovascular problems.