Question

Which of the following function is performed by collecting tubule of Kidney?

• A. In 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 above

Answer 1

Answer: (A)

In the maintenance of pH and ionic balance of blood by the secretion of $H^{+}$ and $K^{+}$ ions

Renal collecting tubule is also called as collecting duct of Kidney. It is a long narrow coiled tube that concentrate and transport urine from the nephrons into the renal pelvis and ureters. It maintains the pH and ionic balance of blood by secreting H${}^{+}$ and K${}^{+}$ ions. It uptakes sodium ions and extrudes potassium ions through Na${}^{+}$/K${}^{+}$ ATPase transporter. They also play important role in absorbing many ions and reabsorbing water.

Thus, the correct answer is option A.