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10_Excretory_System_S13 - Biology 1115 Class Outlines and...

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Biology’1115,’Class’Outlines’and’Study’Guide’ 90’ The Excretory System Functions: 1. regulation of blood volume 2. pH regulation 3. excretion of nitrogenous wastes Basic Anatomy of the System: Kidneys :’ (2)’filter’blood’to’produce’urine Ureters :’ (2)’carry’urine’to’bladder Bladder :’ (1)’collects’urine ’ Urethra :’ (1)’passage’of’urine’from’the’body o Differences’between’males’and’females? More Details on the Kidneys: Anatomy’ Cortex:’ Medulla:’ Pelvis:’ Explain’renal’circulation ’ The Nephrons: How’many’per’kidney? What’do’the’nephrons’do? What’happens’if’you’only’have’one’kidney?
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Biology’1115,’Class’Outlines’and’Study’Guide’ 91’ The Nephron Glomerulus Bowman’s capsule Proximal convoluted tubule Loop of Henle Distal convoluted tubule Collecting duct
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Biology’1115,’Class’Outlines’and’Study’Guide’ 92’ What is in urine? Water’ Certain’ions’such’as: o How’do’the’kidneys’help’regulate’pH? If’too’acidic: ’ If’too’basic: ’ Nitrogenous wastes ’ products’which’are’produced’by’the’cells: o Urea :’as’cells’break’down’proteins,’they’produce’ ammonia .’This’is’too’toxic’for’ the’kidneys’to’handle.’So,’the’liver’converts’ammonia’to’urea’(which’is’less’ toxic),’which’the ’ kidneys’then’excrete. ’ o Creatinine :’created’in’muscle’cells’as’creatine -PO 4 ’ is’used’for’ATP’production o Uric acid :’produced’as’cells’break’down’DNA’and’RNA Other’items’such’as: Basic characteristics of urine: Water’content: ’ pH’range: ’ What’should’ne ver’be’in’urine? Sterility’issues: ’
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Biology’1115,’Class’Outlines’and’Study’Guide’ 93’ Control of urine volume and relationships to blood volume and pressure Three’hormones’are’used’to’control’blood’volume o ANP ’ (atrial’natiuretic’peptide)’which’is’made’by’the’heart Trigger’for’secretion’of’the’hormone :’ What’does’the’hormone’do? How’does’it’work? What’is’the’end’result’concerning’urine’volume? o ADH ’ (anti-diuretic’hormone)’which’is’made’by’the’hypothalamus’and’stored’and’ released’from’the’pituitary Trigger’for’secretion’of’the’hormone: What’does’th e’hormone’do? ’ How’does’it’work? What’is’the’end’result’concerning’urine’volume? What’inhibits’this’hormone?
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