Animal Biology #21
URINARY SYSTEM AND HOMEOSTASIS

Homeostasis in general Temperature regulation Kindeys             Kidneys*       Retroperitoneal position     Tubule anatomy       Juxtaglomerular cells (sense BP, secrete renin)       Podocytes; filtration (<3nm vs >5nm)       Control of kidney       Resorption       Counter-current multiplier; role of ADH Urinary ducts and bladder Keeping body fluids in balance    Water is usually best           Special cases: vomiting, diarrhea (very old or babies);           endurance athletes     Acid-base (pH) balance:     CO2 + H2O   ⇌   H+ + HCO3-           (phosphate and protein buffers, too)     Hormones (esp. aldosterone) --> Na+ retention --> bloating Development of excretion and urinary organs      Pronephros, Mesonephros, Metanephros

LINKS: Urogenital sys. (Penn. State)

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rev. Mar. 2016

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