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| 1. |
What is known as master clock in human brain? |
| Answer» Circadian rhythms\xa0are 24-hour cycles that are part of the body\'s internal clock, running in the background to carry out essential functions and processes. One of the most important and well-known\xa0circadian rhythms\xa0is the sleep-wake cycle. In vertebrate animals, including\xa0humans, the\xa0master clock\xa0is a group of about 20,000 nerve cells (neurons) that form a structure\xa0called\xa0the suprachiasmatic nucleus, or SCN. The SCN is located in a part of the\xa0brain called\xa0the hypothalamus and receives direct input from the eyes. | |