NURS 6320_70 Pathophysiology Midterm Study Guide Spring 2019/20 Below are areas you need to focus on for the midterm exam. • Acid-base balance: o 1. Hydrogen ions, which maintain membrane integrity and the speed of enzymatic reactions, must be concentrated within a narrow range if the body is to function normally. o 2. Hydrogen ion concentration is expressed as pH, which represents the negative logarithm of hydrogen ions in solution. o 3. Different body fluids have different pH values. o ...