Question

Which of the following functions is performed by the collecting tubule of the kidney?

• A. The maintenance of pH and ionic balance of blood by the secretion of $H^{+}$ and $K^{+}$ ions.
• B. Maintenance of pH of blood and removal of $N{a}^{+}$ and $K^{+}$ ions.
• C. Absorption of glucose and ammonia from the blood.
• D. None of the above

Answer 1

The correct option is A The maintenance of pH and ionic balance of blood by the secretion of $H^{+}$ and $K^{+}$ ions.

Collecting tubule of the nephron helps in reabsorption of Na+ and water and secretion h+ and k+ in presence of hormones aldosterone and anti diuretic hormone. Thus it maintains the ionic balance and pH with the help of hormones.

It doesn't play any role in reabsorption of glucose and amino acids as they are already reabsorbed in pct.

It helps in reabsorption of Na+ in presence of aldosterone.

So the correct option is a.