1. Importance of Water
Part 2

2. 3. polarity / solvent properties
Continued from part 1
3. polarity / solvent properties

3. biological colloids - hydration layers surround large charged molecules (ex: proteins) and keep them from settling out

4. solvent - major transport medium

5. dissolving medium - used by special molecules that act as body lubricants
ex: mucus, serous fluid

6. 4. reactivity Involved in decomposition and synthesis reactions
Decomposition = breaking down
Synthesis = building

7. dehydration synthesis
making a new compound by removing a water molecule
C6H12O6 + C6H12O6 → C12H22O12 + H2O + →
H2O +

8. hydrolysis → break down a compound by adding water ex: digestion
C12H22O12 + H2O → C6H12O6 + C6H12O6 → +
H2O +

9. Hydrolysis and Dehydration Synthesis Reactions

10. 5. cushioning around certain body organs to prevent physical trauma
ex: cerebrospinal fluid around brain