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Endocrine System - Human Physiology - Lecture Notes

Lecture Notes, Human Physiology

Post: December 23th, 2012
Description
Endocrine System, Endocrine Gland, Comparison of Communication Systems, Chemical Messenger, Nervous System, Chemical Signal Molecules, Classification of Hormones, Mechanisms of Hormone Action are some points from this lecture. Human Physiology lecture handout. Its a very detailed and comprehensive lecture notes.
Endocrine System, Endocrine Gland, Comparison of Communication Systems, Chemical Messenger, Nervous System, Chemical Signal Molecules, Classification of Hormones, Mechanisms of Hormone Action are some points from this lecture. Human Physiology lecture handout. Its a very detailed and comprehensive lecture notes.
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Contents
Endocrine System 1 A. Overview endocrine gland - secretes hormones; no ducts hormone - chemical messenger, carried in blood, affects target cells (i.e., cells that have receptors for the hormone) receptor - binds to hormone, required for response to the hormone 1. Comparison of Communication Systems Nervous System fast response short duration secretes neurotransmitters specific, localized effects Endocrine System slow response longer duration secretes hormones widespread effects 2. Classes of Chemical Signal Molecules neurotransmitters - affect a specific cell (the postsynaptic cell) at a synapse hormones - affect target cells throughout the body neurohormones - hormones secreted by neurons paracrine substances (e.g., prostaglandins) - exert local effects on neighboring cells B. Chemical Classification of Hormones 1. Lipophilic (lipid-soluble) e.g., steroid hormones, thyroid hormones, eicosanoids - cross the plasma membrane - bind to intracellular (cytoplasmic) receptors 2. Lipophobic..

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