Which of the Following is Not a Function of the Lungs

Question

Which of the following is not a function of the lungs?
A) Oxygenation of blood
B) Excretion of carbon dioxide
C) Secretion of aldosterone and the regulation of Na+
D) Regulation of blood pH

Accepted Answer

The lungs are not involved in the secretion of aldosterone or the regulation of Na+. These functions are carried out by the adrenal glands and kidneys. The other options, oxygenation of blood, excretion of carbon dioxide and regulation of blood pH are all functions of the lungs.