1. it is a solvent (a solute can be dissolved in it)

2. It is a lubricant (smooths movement)

3. It is a cushion (insulates tissues and cells from bumps and blows of daily life)

4. It is a heat sink (absorbs heat without much change in temperature)

water is broken into its constituent parts

The water molecule separates into a hydrogen ion (H+) and a hydroxyl ion (OH-), and one part of the broken polymer receives the hydrogen ion (H+) while the other part receives the hydroxyl ion (OH-)

a chemical that releases hydrogen ions (H+) when dissolved in water.

play a rold in metabolism

Bicarbonate structure

c in middle

1 single o 

1 single OH

and one double O

Carbohydrates

organic molecules composed of atoms of carbon, hydrogen, and oxygen arranged in short or long chains or rings.

important source of energy

Slick, greasy, nonpolar substances that are hyrdophobic

Composed mainly of carbon and hydrogen, with a few oxygen

Very greatly in the chemical structure

If all of the carbon atoms in a fatty acid chain are linked by single bonds, each carbon atom will have two hydrogen atoms attached to it

quite straight and tightly packed

carbon atoms in a fatty acid chain are linked by double bonds

they have the maximum possible number of hydrogen atoms

Formed mainly of carbon and hydrogen atoms and are slick, oily substances

consist of four interlocking rings or carbon and hydrogen to which are attached short chains that govern the specific function of each steroid