<prompt> In metabolic alkalosis, there is which of the following?Gain in fixed acidLoss of baseHyperkalemiaRise in base excess  <response>: In metabolic alkalosis, there may be a loss of fixed acids or excess of base. It is associated with hypokalemia because of renal conservation of H ions and urinary potassium loss. Loss of hydrochloric acid as seen in vomiting in patients with pyloric obstruction results in hypochloremic, hypokalemic, metabolic alkalosis. 