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Hello students, in this question we have to discuss how hypothalamus communicates with both anterior and posterior pituitary glands via the portal system and neurons respectively.
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The hypothalamus is a small region of the brain that plays a crucial role in regulating various physiological processes including release of hormones.
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It communicates with both anterior and posterior pituitary through different mechanisms.
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One is the hypothalamohypophageal portal system.
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The system is a complex network of blood vessels that connect hypothalamus to the anterior pituitary.
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Hypo with the anterior pituitary.
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This system allows for the direct communication and transport of hormones between the two structures.
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The hypothalamus produces and releases specific hormones called releasing hormones or releasing factors.
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These hormones are secreted into the portal system.
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The releasing hormones travel to the portal blood vessels and reach the anterior pituitary and stimulate or inhibit the release of specific hormones called tropic hormones.
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The tropic hormones then travel through the bloodstream to their target organs or glands where they regulate the release of other hormones.
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For example hypothalamus produces and releases hormone called thyrotropin releasing hormone into the portal system.
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Now ths simulates the anterior pituitary to release tsh that is thyroid stimulating hormone.
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Tsh in turn acts on the thyroid gland to stimulate the release of thyroid hormones...