The cell
membrane
-
Is
made of protein and fat.
-
The
membrane is a bilayer of phospholipids. This means there are two layers.
-
The
phospholipids are made of a phosphate and a lipid
-
Lipid=fat.
-
Lipids
are HYDROPHOBIC , water hating
-
Phosphate
part is HYDROPHYLLIC
Water-
loving.
Proteins
are scattered in the membrane and they
assist the
cell to
Allow things
in and out.
Lab: A demo
of hydrophyllic and hydrophobic properties of three substances.
Substances:
1. Soap – has two sides. One is hydrophobic and the other is
hydrophyllic
2. milk –is a suspension of fat
droplets suspended in water.
3. food dye - loves water.
Hydrophyllic,
We added drops of food dye to milk and then we added a drop of soap Next, we wrote our observations and hypothesis. The teacher evaluated the hypothesis.
