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英文
第 2 題
According to the text, how does the Suprachiasmatic Nucleus (SCN) regulate sleep onset?
- A By producing beta-amyloid to signal the end of the photoperiod.
- B By directly secreting melatonin into the retinohypothalamic tract.
- C By inhibiting or allowing the pineal gland's hormone production based on light signals.
- D By converting short-wavelength blue light into metabolic waste in the hypothalamus.
思路引導 VIP
文中指出，SCN 在有光的情況下會抑制松果體分泌褪黑激素，而在無光時則觸發分泌，以此調節睡眠。
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