Fort Rucker. Fort Rucker is a U.S. Army post located mostly in Dale County, Alabama, United States. It was named for a Civil War officer, Confederate General Edmund Rucker.
The reason that the cell membrane is considered to be 'semi-permeable' is because there are certain materials that can pass through the cell membrane (e.g. hydrocarbons and oxygen cross through the cell membrane as they can be dissolved into the lipid layer-other examples include small polar molecules.he basic structure of the cell membrane consists of layers. The cell membrane is a phospholid bi-layer. It is made up of proteins and lipids (also known as the phospholipid).
Plasma membrane is also a phospholipid bilayer which is essentially a biomembrane that can cover a cell or a cell organelle. For example, lysosome is a cell organelle which contains hydrolytic enzymes and it is bound by a single layer of plasma membrane. While, mitochondria, the powerhouse of the cell is bound by two layers of plasma membrane. Even the nucleus is membrane bound in eukaryotic cells. Hope that helps.