Neurons in the Suprachiasmatic Nucleus, or SCN in the Hypothalamus

question 22

Multiple Choice

Neurons in the suprachiasmatic nucleus, or SCN in the hypothalamus connect to the retina and optic nerve. When you wake up in the morning, exposure to light stimulates neurons in SCN to "reset." These neurons then send __________ to the pineal gland, which __________.

• A) extitatory signals, increases the release of melatonin
• B) extitatory signals, decreases the release of melatonin
• C) inhibitory signals, decreases the release of melatonin
• D) inhibitory signals, increases the release of melatonin

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Definitions:

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