Water balance part 1 Flashcards
Life depends on maintaining 3 things:
1) The proper amount of water in the body
2) The correct proportion of electrolytes and water
3) The proper acid-base balance
What is water’s overall charge?
Neutral (Same number of protons and electrons)
Even though water has an overall neutral charge, is each water molecule polar or non polar? Why?
- Polar
- electrons are asymmetrically distributed making the molecule have a polar charge
Does water have two separate charge ends? what are they?
- Yes
- One end is slightly positive
- The other end is slightly negative
Does oxygen draw electrons close to or away from hydrogen?
-oxygen draws electrons AWAY FROM hydrogen
Water molecules contain what kinds of bonds?
hydrogen
At 37 degrees C, 15% of water molecules are joined to 4 other water molecules as…
“flickering clusters”
What properties are water’s cohesive bondness responsible for?
High surface tension, specific heat, etc
Why can two adjacent water molecules form hydrogen bonds?
because water is polarized
Which is stronger? Covalent or Hydrogen bonds?
Covalent bonds
Which bond is longer? Covalent or Hydrogen bonds?
Hydrogen bonds are longer (.27 nm). Covalent bonds are shorter (.10 nm)
Water is a solvent. What does this mean?
It means many substances dissolve in water. The molecules separate from each other and are each surrounded by water molecules.
Solution
a substance dissolved in a liquid
Solute
the dissolved substance
Solvent
the liquid
Hydrophilic molecule
a substance that dissolves readily
What are hydrophilic molecules composed of?
ions or polar molecules
How do hydrophilic molecules attract water?
through electrical charge effects
Hydrophobic molecules
molecules that are insoluble in water
What kind of bonds do hydrophobic molecules contain?
non-polar bonds
What kind of bonds are water molecules not attracted to?
C-H bonds (hydrocarbons)
Will water molecules surround C-H bonds?
No
What is the largest single constituent of the body?
Water
How much of the total body weight is water?
60%