by rebecca coughlin. the pineal gland is a small pine cone-shaped endocrine gland located near the...
TRANSCRIPT
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By Rebecca Coughlin
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The Pineal Gland
Is a small pine cone-shaped endocrine gland located near the center of the brain and attached to the posterior end of the roof of the third
ventricle in the brain. It is stimulated by nerves from the eyes.
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Melatonin: Hormone produced by the Pineal Gland
• Amine Hormone; derived from tryptophan
• Target receptors are located in plasma membrane; uses second-messenger system
• Regulates human sleep-wake cycles
• Stimulated by darkness, inhibited by light
• Suspected to affect reproductive functions
• Linked to onset of puberty
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SAD (Season Affective Disorder)
Caused when too much
melatonin is produced, especially
during the long nights of
winter, causing profound
depression, oversleeping, weight gain, tiredness, or
sadness. Treatment consists of exposure to bright lights for several
hours each day to inhibit melatonin
production.
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Melatonin supplements can be taken to help combat:
• Jet Lag• Insomnia of the elderly
• Various Sleep Disorders•and more
Steady exposure to light can disrupt the natural production of melatonin and disrupt the body’s biological clock and cause sleeping problems.
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1) Where is melatonin produced? -the pineal gland
2) What stimulates the Pineal Gland? –darkness/night
3) What type of hormone is Melatonin? –amine hormone
4) What does Melatonin regulate? -the sleep-wake cycle/ biological clock
5) What disorder is caused by too much melatonin? -seasonal affective disorder
Quiz