FSN 101 Lecture 10: Water
9 Nov 2016
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Surface water (lakes, ponds, and rivers: depending on source can be hard or soft, acidic or alkaline. Ground water (well water: filtered through soil and bedrock so can dissolve minerals as it percolates through materials. Reverse osmosis (ro: free of all dissolved minerals and contaminants-pure. Hard water: high concentrations of ca and mg, difficult to lather soap. Soft water: high concentrations of na, easy to lather soap. Ph the acid/base of the water (municipal drinking water ph 7. 5-8. 5) Adipose tissue is ~20% water lean muscle is ~73% water the flow (movement) of water in our bodies depends on dissolved ions: k, na, cl, po. Intracellular fluid: fluid within cells, 2/3 of body fluid. Extracellular fluid: fluid outside of cells, 1/3 of body fluid, 2 types. Movement of water (solvent) through a semi-permeable membrane. Water moves in direction of low solute (sugar/salt) concentration to high solute concentration. Regulates body temp: very efficient heat sink".
