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Hydrogen Ions Secretion Process and Location

On the mode and place of hydrogen ion secretion
Doctors study the subtleties of the human body and observe the mysteries of physiology. In ion metabolism, special attention is paid to the secretion of hydrogen ions, which is one of the key points of physiology.

The process of hydrogen ion secretion is complex and delicate. In the proximal tubule of the kidney, epithelial cells use the power of proton pumps to actively pump the hydrogen ions in the cells into the tubule fluid. This pump requires energy, which is powered by ATP hydrolysis to transport hydrogen ions against the concentration layer. Moreover, the proximal tubule cells can also be operated with Na-H-exchanger. The sodium ions in the tubule fluid enter the cell cis-concentration, while the intracellular hydrogen ions come out to the tubule fluid. This synergistic transport is wonderful and maintains the ion balance in the body.

Furthermore, the distal tubule and the collecting tube are also the places where hydrogen ions are secreted. The leap cell performs this function, and its top membrane has a proton pump and a Cl- HCO 🥰 exchanger. The proton pump is still powered by ATP to secrete hydrogen, while the Cl- HCO 🥰 exchanger allows the chloride ions in the tubule fluid to exchange with the intracellular bicarbonate ions, accompanied by the secretion of hydrogen ions. This process is delicate and is related to the maintenance of acid-base balance.

In summary, hydrogen ions are secreted in the proximal convoluted tubules, distal convoluted tubules and collecting ducts of the kidney, and are responsible for their secretion in a coordinated manner of active transport and exchangers. It is essential for the maintenance of human physiological homeostasis. Only by understanding this principle can doctors identify the abnormality of ion metabolism in clinical practice and provide appropriate diagnosis and treatment.