Question

Renal tubular secretion helps in maintaining

• A. constant glomerular filtration rate
• B. increasing osmolarity towards inner medulla
• C. urine to be concentrated
• D. ionic and pH balance in body fluids

Answer 1

The correct option is D ionic and pH balance in body fluids

Urine formation has three main steps - ultrafiltration, reabsorption and secretion. While ultrafiltration is carried out by glomerulus, reabsorption and secretion is carried out by renal tubule.

Cells of renal tubule secretes substances like H+, K+ and ammonia into the filtrate. Tubular secretion helps in maintaining ionic and pH balance in body fluids.