Capitol Report: Iranâs Global Threat. This week, I voted to stop the dangerous deal the Obama Administration negotiated to lift sanctions on Iran. I voted to protect Americans from the global threat posed by a nuclear Iran, because this is not a Republican issue or Democrat issue; this is an American security issue.
Cell Membrane Structure. The cell membrane is primarily composed of a mix of proteins and lipids. Depending on the membraneâs location and role in the body, lipids can make up anywhere from 20 to 80 percent of the membrane, with the remainder being proteins.
The cell membrane is the outermost barrier of an animal cell. As for plants, the cell membrane is surrounded by the cell wall, which gives the cell a much more rigid structure. To clarify, all cells have a plasma membrane. The function of the cell membrane is to protect the cell and control the transport from the inside to the outside of the cell. It contains transport signaling systems such as protein channels through which substances such as salts pass.