A circadian rhythm is a 24 hour cycle in the physiological processes of all the living organisms. Which of the following hypothalamic nuclei is most important for encoding the set point for this daily circadian rhythms?
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Supraoptic nucleus
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Arcuate nucleus
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Pretectal nucleus
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Paraventricular nucleus
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Suprachiasmatic nucleus
E
Correct answer
Explanation
The suprachiasmatic nucleus is a group of brain cells located in the hypothalamus. It regulates the circadian cycles and also influences many physiological and behavioural rhythms occurring over a 24-hour period, such as the sleep/wake cycle.