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A&P II Notes Feb 15

A&P II Notes Feb 15 - Anatomy Physiology II Notes...

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Anatomy & Physiology II Notes – 2/15/07 Thymus Gland Important in the development of certain white blood cells known as T lymphocytes Produces a group of hormones called thymosin Largest in childhood and gets smaller throughout life due to the inhibition by glucocorticoids Located right above the heart Pineal Gland Function isn’t clear in humans Produces a hormone called melatonin – receives information about light and dark, produced  primarily in the dark (levels increase with darkness), inhibits reproduction in animals (inhibits  ovulation and sperm production through inhibition of LH and FSH) Seasonal Affective Disorder (SAD) – response to the lack of light in the winter, full-spectrum  lights can be used to reduce the symptoms Mechanisms of Hormone Action How does a hormone affect a target tissue?
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