Exocrine glands commonly secrete salt using Na+-K+-2Cl- cotransporters
to drive secondary active Cl- transport; this process is blocked by f
urosemide. However, Secretion in some glands depends on furosemide-ins
ensitive mechanisms. Some use a Na+-H+ exchanger to transport HCO3-; o
thers may transport HCO3- and HP42-.