Which of the following is correct
1, Hydrogen ions are secreted by Na+/H+ antiporters in the proximal tubules
2,H+ATPases (proton pumps) in the collecting secrete hydrogen ions
3,Cl-/HCO3- antiporters help with hydrogen ion reabsorption
a,1 only
b, 2 only
c, 3 only
d, 1 and 2 are correct
e, 1,2, and 3 are correct
Metabolic reaction can produce
a, H+
b, HCO3-
c, Nonvolatile acids
d, Volatile bases
E, Ca+1