Vomiting caused by an illness or bulimia leads to loss of extremely acidic stomach fluids. Loss of acidic stomach fluid shifts your blood pH to a more alkaline range. Extreme alkaline shifts of blood plasma are referred to as alkalosis . B. Cell Membrane Cells are the basic building blocks of living systems. Cells are surrounded by a watery environment called extracellular fluid .
Most cells have some similarities in design.
The outer surface of a cell is called the cell or plasma membrane . The cell or plasma membrane is made up primarily of phospholipids so that it is selectively permeable or semi-permeable . An exception is water. Water is an extremely small molecule and there may be small channels in the membrane that allow water to move freely into or out of a cell. Some cells increase the amount of membrane by forming a dense series of finger-like projections called microvilli on one side of a cell.