Lecture 26 - BIOL104-04 Principles of Biology I October 29,...

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BIOL104-04 Principles of Biology I October 29, 2010 Lecture #26 Ch 46 The endocrine system
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The endocrine system secretion hormone into the bloodstream are called endocrine glands
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The endocrine system endocrine system vary among animals – Neurons secrete hormones in insects – Salmon have a specialized gland for regulating Ca 2+ concentration – Humans • all the organs that secrete hormones • Thyroid, pituitary, adrenal glands, etc.
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Chemical characteristics of hormones • Organic compounds • Secreted from the cells where they are synthesized • Act of target cells remote from their point of origin • Are present in extremely small concentrations yet have large effects
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What do hormones do? • Hormones coordinate the activities of cells in response to 3 general situations: • Environmental changes • Homeostasis
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This note was uploaded on 05/03/2011 for the course BIOL 104 taught by Professor Bray-speth during the Fall '11 term at Saint Louis.

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Lecture 26 - BIOL104-04 Principles of Biology I October 29,...

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