How does a cell maintain equilibrium?
When the human body is maintained in a steady state, the condition is called homeostasis. The body consists of trillions of cells that perform many different functions, but all of them require a similar internal environment with important variables kept within narrow ranges. Cells require a certain range of body temperature, pH of extracellular fluids, and concentration of mineral ions and glucose in the blood. Each of these variables must be maintained within a narrow range of values — regardless of changes in the external environment, food that has been consumed, the body’s activity level, or other changes in the human organism.