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18 Cards in this Set
- Front
- Back
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where is the pineal gland
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attached to the roof of the 3rd ventricle of the brain
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what is the pineal gland made of:
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consists of pinealocytes and neuroglia
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what is responsible for setting the "biological clock"
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melatonin
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what is the treatment for jet lag and SAD
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bright light
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what is the pineal gland a part of:
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the epithalamus
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what is the function of melatonin?
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it enhances sleep
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what is the precursor to melatonin?
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secretonin
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what influence does melatonin have on reproduction?
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it can decrease GnRH from the hypothalamus, inhibiting reproductive function
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what is the function of arginine?
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regulates function of reproductive system in some animals
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what is the effect of norepinephrine on melatonin
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it inhibits its secretion
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what stimulates the pineal gland
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norepinephrine from the superior cervical ganglion
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what happens in darkness?
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lack of norepinephrine stimulates melatonin
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what happens in light
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norepinephrine inhibits melatonin secretion
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what is a circadian cycle?
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an internal clock with an intrinsic 24-25 hour cycle
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where is the circadian clock at in the brain?
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in the suprachiasmatic nucleus
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what is SAD?
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depression that occurs during the winter months when the day length is short
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what causes SAD?
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the overproduction of melatonin
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how do you treat SAD and Jet lag?
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exposure to artifical light or sunlight
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