plasmakalvolle

Plasmakalvolle is a Finnish term that translates to "plasma membrane" in English. It refers to the biological membrane that separates the interior of all cells from the outside environment. This vital structure is composed of a phospholipid bilayer with embedded proteins. The plasma membrane regulates the passage of substances into and out of the cell, a process known as selective permeability. It plays a crucial role in maintaining cell shape, cell signaling, and cell adhesion. The fluidity of the plasma membrane, described by the fluid mosaic model, allows for the movement of its components and the dynamic nature of cellular processes. Proteins within the membrane can act as channels, transporters, receptors, or enzymes, contributing to a wide range of cellular functions. In certain organisms, like plants and bacteria, the plasma membrane is surrounded by a cell wall, providing additional structural support and protection. The integrity and proper functioning of the plasmakalvolle are essential for cell survival and the overall health of an organism.