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. The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out.
In simple terms, the cell membrane can be thought of as the skin or protective barrier of cell. It keeps all the internal components â or cytoplasm â of a cell inside of it, and the external items outside of it. Its main purpose is to maintain the integrity of the cell and determine what can enter and exit the cell.