When shift workers attempt to sleep during daylight hours, what process is suppressed, contributing to disrupted sleep patterns?

💡 Explanation

Melatonin production is regulated by the suprachiasmatic nucleus and is normally secreted at night. Exposure to daylight inhibits melatonin secretion because light suppresses its synthesis in the pineal gland, therefore sleep is disrupted rather than promoted, histamine or adenosine are less direct mechanisms, and cortisol levels are not directly suppressed by light exposure.

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