What is the pathophysiologic basis for the acidosis associated with hypovolemic shock?
A. Poor respiratory effort secondary to skeletal muscle weakness caused by the hy-drogen ion excess
B. Lactic acid production resulting from decreased oxygen delivery to the tissues and increased anaerobic metabolism
C. Failure of the kidneys to excrete hydrogen ions and reabsorb bicarbonate ions as a result of renal hypertension
D. Increased sensitivity of the central chemoreceptors, enhancing the rate and depth of ventilation
B
The syndrome of hypovolemic shock results in inadequate tissue perfusion and oxygenation; thus, some cells are metabolizing anaerobically. Such metabolism increases the synthesis of lactic acid, resulting in an increase in hydrogen ion production and acidosis.
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