Which response is an example of compensation for an acid-base imbalance?
a. Increase in the rate and depth of respirations when exercising
b. Increased urinary output when blood pressure increases during exercise
c. Increased thirst when spending time in an excessively dry environment
d. Increased release of acids from kidneys during exacerbation of chronic obstructive pulmonary disease (COPD)
A
The respiratory system increases its activity by blowing off excess carbon dioxide. This occurs as a result of the occurrence of lactic acidosis in skeletal muscle, when blood flow and oxygenation are insufficient to meet the increased demand for oxygen (oxygen debt) created during increased skeletal muscle metabolism. The other three options are not compensatory mechanisms for acid-base imbalances.
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