<prompt> Which of the following is cause of Hyperkalemia:ExerciseAlkalosisInsulin injectionDecrease serum osmolarity  <response>: Exercise causes hyperkalemia because Na-K pump cannot keep pace with the K efflux from muscle during the depolarization-repolarization process of the sarcolemmal membrane during muscle contraction. Causes of shift of K out of cells i.e. Hyperkalemia: Insulin deficiency Beta adrenergic antagonist Acidosis Hyperosmolarity Inhibitors of Sodium potassium ATPase pump Exercise Cell lysis Causes of shift of K into cells i.e. Hypokalemia: Insulin Beta adrenergic agonist Alkalosis Hypoosmolarity 