<prompt> Answer this question truthfullyHow does H secretion occur from α-intercalated cells and what are the pumps involved in this process?  <response>: <reason> H secretion from α-intercalated cells in the collecting duct of the kidney is an important mechanism for regulating acid-base balance in the body. This process occurs via the luminal membrane of the cells, which contains two types of pumps: the H ATPase and the H-K ATPase pumps. The H ATPase pump uses energy derived from ATP hydrolysis to transport H ions from the cytoplasm of the cell into the lumen of the collecting duct. The H-K ATPase pump, on the other hand, exchanges H ions for K ions, and also contributes to H secretion into the lumen. Together, these pumps help to maintain the pH balance of the body by removing excess H ions from the blood and excreting them in the urine. 