At Night, the Suprachiasmatic Nuclei (SCN) Located in the Hypothalamus

question 33

Multiple Choice

At night, the suprachiasmatic nuclei (SCN) located in the hypothalamus

• A) are inactive allowing melatonin levels to increase thereby promoting relaxation and sleepiness.
• B) are inactive allowing melatonin levels to decrease thereby promoting relaxation and sleepiness.
• C) are stimulated directly from the cortex.
• D) are more active allowing melatonin levels to increase thereby promoting relaxation and sleepiness.
• E) are more active allowing melatonin levels to decrease thereby promoting relaxation and sleepiness.

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