1. Homeostasis - a constant internal environment In This Topic We´ll See How Mammals Need A Constant Temperature Constant Blood Glucose The Kidney- Constant Water, Salt + Urea Intro.  Cells and Enzymes (in cells) work best in certain conditions.  Cells and enz s. need a certain H 2 0 level Temp pH lack of toxins salt levels glucose levels

2. Mammals Regulate Their Internal Temp. To Cool Down There are 4 ways we cool ourselves down. 1)Sweat ………. 2)Small arteries vasodilate ……… …………….. So more heat is lost by _________. 3)Hair stays ________. 4)__ shivering. To Warm Up 1)No ______. 2)Small arteries vasoconstrict …………............... So less _____ is lost by ___________. 3)Shivering = ………………………………………….. 4)Hairs stand on end, a layer of air is trapped. Still / trapped air is an excellent insulator. Heat, radiation, radiation, sweating, flat, No,

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