Osmosis
Osmosis happens to equal the concentration on both sides of the membrane. If one side has a higher concentration, water will keep doing through the membrane till both side have an equal concentration.
Summary of section/Missing information
The cell membrane is the area between the cell and its environment. It allows nutrients like glucose, amino acids, and lipids into the cell, while it allows waste and other things out of the cell. It helps keeps the cell’s homeostasis, while water freely moves in and out of the cell.
The structure of the cell membrane is a phosphate bilayer, which are two layers of phospholipids. Phospholipids are made up of a glucose backbone, two fatty acid chains, and a phosphate head. With the phosphate bilaryer the phosphate heads stick out of the cell while the two fatty acids are inside. This is because the heads are hydrophilic which means they love water, while the fatty acids are hydrophobic which means they hate water. The plasma membrane is not only made up of the phosphates, it also has cholesterol molecules which stabilizes the membrane and protein transport which allows certain things in and out of the cell.
There are two different kinds of cell transport. One is passive transport which uses no energy; an example of one is facilitated diffusion which is the ones in the cell. Then there is active transport, which uses energy allows ions into the cell which has a high concentration then where it was being pushed from. An example of active transport is endocytosis.
The diffusion of water across a selectively permeable membrane is called osmosis. They balance both side of the membrane, such as
an isotonic solution which has the same solution. Then there is hypotonic solution that is when there is more water inside the cell then outside the cell. Then finally there is hypertonic solution which there is more water outside the cell then inside which causes it to wrinkle.
