BIOLOGICAL BASES OF BEHAVIOR
BIOLOGY OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Melatonin
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Suprachiasmatic Nucleus
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Pineal Gland
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Optic Nerve
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Detailed explanation-1: -The suprachiasmatic nucleus (SCN) is a bilateral structure located in the anterior part of the hypothalamus. It is the central pacemaker of the circadian timing system and regulates most circadian rhythms in the body.
Detailed explanation-2: -The SCN contain various serotonin (5-HT) receptors. 5-HT input from the midbrain raphe helps to modulate the SCN response to light by regulating phase shifts.
Detailed explanation-3: -Circadian rhythms in mammals are regulated by the suprachiasmatic nucleus (SCN) in the hypothalamus, which serves as the “master clock” for the brain and body.
Detailed explanation-4: -The tiny suprachiasmatic nucleus (SCN) of the hypothalamus plays a central role in the daily programming of organismic functions by regulating day-to-day oscillations of the internal milieu and synchronizing them to the changing cycles of day and night and of body state.