Okuma AnlamaSoru #11111
The Biology of Circadian Rhythms
Circadian rhythms are 24-hour cycles that govern essential physiological processes in virtually all living organisms, from single-celled algae to humans. In mammals, the central pacemaker orchestrating these rhythms is the suprachiasmatic nucleus (SCN), located within the hypothalamus. The SCN relies heavily on photic signals received from specialized retinal ganglion cells to synchronize the body's internal clock with the external day-night cycle. This internal timing mechanism regulates core body temperature, hormone secretion such as melatonin and cortisol, and metabolic rate. Chronic disruption of circadian rhythms—common among shift workers and excessive nocturnal screen users—has been linked to elevated risks of obesity, cardiovascular disorders, and depression. The passage states that chronic disruption of natural circadian cycles ----.
- A)can increase susceptibility to serious physical and psychological disorders
- B)enhances cognitive stamina during prolonged overnight work shifts
- C)permanently damages the anatomical structure of the hypothalamus
- D)eliminates the human requirement for nocturnal melatonin secretion
- E)improves cardiovascular resilience and metabolic efficiency
Cevabı ve çözümü göster
Doğru cevap: A) can increase susceptibility to serious physical and psychological disorders
Çözüm: Paragrafın sonunda kronik sirkadiyen bozulmanın obezite, kardiyovasküler hastalıklar ve depresyon riskini artırdığı belirtilmiştir. Doğru cevap A'dır.