NEET MDS

The Power Course

In respiratory acidosis and renal tubular cells



Choices

1 ) More Na is reabsorbed
2 ) More K is reabsorbed
3 ) More Hydrogen ions are absorbed
4 ) More bicarbonate ions are excreted.

Explanation


Renal tubular cells have carbonic anhydrase this can produce HCO3- and H+ from CO2. In presence increased CO2 secondary to respiratory acidosis more bicarbonate and Hydrogen ions are produced.  These cells secrete Hydrogen ion into the tubular fluid in exchange for sodium. Bicarbonate is actively reabsorbed into peritubular capillary. For each hydrogen ion secreted into tubular fluid one sodium and one bicarbonate ion is absorbed.

In Respiratory alkalosis  kidney decreases H+ secretion and depresses HCO3 reabsorption


Answer

More Na is reabsorbed

Last Modified : 25-Dec-2019

Previous MCQ
Next MCQ
Enter your email address:

Subjects

Chapters

Previous Years Question Papers