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6-Endocrine System

6-Endocrine System - Chapter 6 The Endocrine System...

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Chapter 6 The Endocrine System
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Endocrine System Long-distance communication Slow (in comparison to neurotransmission) because most hormones must enter the bloodstream to travel to target cells.
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Endocrine System
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Endocrine System Primary Endocrine Organs: Primary function is the secretion of hormones Secondary Endocrine Organs : Primary function is something else, secondary function is to secrete hormones
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Hypothalamus and Pituitary Gland Both primary endocrine organs Most hormones released by hypothalamus affect pituitary gland
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Hypothalamus and Pituitary Gland
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Hypothalamic-Pituitary Portal System Connect hypothalamus and pituitary Portal System : two capillary beds
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Hypothalamic-Pituitary Portal System
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What is the benefit of a portal system? The structure of capillary beds maximizes opportunity for secretion and absorption Hormone secreted in one capillary bed more concentrated and undiluted when passed to next capillary bed
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Hypothalamus and Anterior Pituitary Both secrete primarily trophic hormones Trophic hormones regulate the secretion of other hormones
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Hypothalamic and anterior pituitary trophic hormones
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