conventional microelectrodes , the na+ channel blocker amiloride ( 0.1 mm ) , and the k+ channel blocker tetraethylammonium chloride ( tea , 30 mm ) were used to examine the effects of corticosteroid hormones administered in vivo on the na+ and k+ transport properties of isolated rat distal colon .
C0001617
corticosteroid
C0019932
hormones