3 Thermoregulation p.871 Feedback mechanisms (Fig 44.8) Hypothalamus control (Ch 48)Responses to high body temp?Responses to low body temp?Acclimatization (some mammalian cell proteins)Torpor(hibernation, estivation)
4 Water Balance & Waste Disposal Nitrogenous wastes:Ammonia, urea, uric acid (fig44.10)Osmoregulation: (fig 44.11)Stenohaline, euryhalineAnhydrobiosis (water bears p. 879)
9 Excretory Systems p.879 What is the function of the kidneys? 1. FiltrationNEPHRONS of the kidneysBlood pressure forces blood into the glomerulus; water,urea, small solutes are forced through the filter.Nonselective filtration
10 Excretory Systems in the Nephron Proximal tubule Loop of Henley Distal tubule (collecting duct)99% of water is reabsorbed back into the body
11 Excretory Systems: in the Nephron ReabsorptionSugar, vitamins, nutrients, waterSome salts
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