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.
❓ Según el pasaje, ¿cuál de las siguientes afirmaciones es VERDADERA sobre los ritmos circadianos?
A. A. Están regulados exclusivamente por el núcleo supraquiasmático en el cerebro.
B. B. Los relojes periféricos no se ven afectados por factores externos como la alimentación y la temperatura.
C. C. Las alteraciones en los ritmos circadianos pueden contribuir a problemas metabólicos y cardiovasculares.
D. D. La luz es la única señal ambiental que influye en todos los relojes biológicos.
✅ 正确答案
C. Disruptions in circadian rhythms may contribute to metabolic and cardiovascular problems.
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