UNC-Chapel Hill EXSS 276 - Endocrine System (3 pages)

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Endocrine System



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Endocrine System

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Intro to Hormones


Lecture number:
9
Pages:
3
Type:
Lecture Note
School:
University of North Carolina at Chapel Hill
Course:
Exss 276 - Human Physiology

Unformatted text preview:

EXSS 276 1st Edition Lecture 9 Outline of Last Lecture I Post absorptive state II Absorptive state III Diet and Energy IV Exam Review Outline of Current Lecture I Exocrine vs Endocrine System II Hormones III Classification IV Amplification of Hormone Effects Current Lecture I II Exocrine vs Endocrine System a Exocrine secrete products into ducts ducts carry secretions to target site i Sweat oil mucous digestive glands ii Exo outside b Endocrine secrete products hormones into interstitial fluid of secretory cells then diffuses into capillaries carried away by blood i Pituitary thyroid adrenal pineal glands etc ii Endo w in Hormones a Involves secretion from glands no ducts involved i Endocrine glands secrete products hormones into interstitial fluid of secretory cells then diffuse into capillaries carries away by blood b Endocrine system affects virtually all body tissues i Regulates ii Extracellular fluid iii Metabolism iv Biological Clock v Contraction of cardiac and smooth muscle vi Some immune functions vii Growth and development viii Reproduction c Released I none part of body but regulate activity of cell in other parts These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute III d High degree of specificity i Specific hormones act on specific target cells which have specific receptors for those hormones e Highly regulated by feedback loops f Elicit specific physiological responses g Powerful effects even in low concentrations h Bring about change by i Altering biochemical pathways ii Turning enzymes on off iii Promoting protein synthesis at target tissue i General mechanism of hormone action i 1 Hormone binds to receptor on target cell ii 2 Cell may then 1 Synthesize new molecules 2 Change permeability of membrane 3 Alter rate of reactions iii 3 Each target cell responds to hormone differently Classification a Location of action i Circulating 1 Endocrine hormones



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