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Urinary System Comparing Excretion of Different Organisms • http://www.youtube.com/watch?v=iG6Dd3CO ug4 Comparing Excretion of Different Organisms C o m p o n e n t s Kidney Nephron Function of Nephron Filtration • Blood enters nephron through afferent arteriole • High blood pressure allows solutes in blood to pass through glomerulus and into Bowman’s capsule Solute Glomerulus Bowman’s capsule Water Y Y NaCl Y Y Glucose Y Y Amino acids Y Y H+ ions Y Y Plasma proteins Y N Erythrocytes Y N Platelets Y N Reabsorption Active transport Passive transport Secretion Adaptations Unique Feature Kangaroo Rat • Conservation of water is sufficient that the animal does not need to drink water – Obtains enough water as a product of respiration Effects of ADH Regulating Blood Pressure Effects of Renin (enzyme) Kidney Stones Diabetes Mellitus Diabetes Insipidus Nephritis (Bright’s Disease) • Inflammation of the kidney Quick Review Review Questions • Pg.348 #1-4 • Pg.352 #1-6