Which of the Following Statements Are True of the Kidneys

Which of the following statements are true of the kidneys and acid-base balance (Select all that apply) ?

A) If body fluids become too acidic,the kidneys will secrete H+ ions into the renal filtrate.
B) Kidney cells can obtain H+ ions from the reaction of CO2 and H2O to form carbonic acid.
C) The bicarbonate buffer system is a mechanism for the kidneys to get rid of excess H+ ions and thereby lower the pH of body fluids.
D) The kidneys help maintain the normal pH range of blood of 7.30 to 7.40.