Question

In the kidney, the formation of urine involve the following process arranged as

• A. Glomerular filtration, reabsorption and tubular secretion
• B. Re-absorption, filtration and secretion
• C. Secretion, absorption and filteration
• D. Filtration, secretion and reabsorption

Answer 1

Answer: (A)

• The three basic renal processes are glomerular filtration, tubular reabsorption, and tubular secretion.
• The blood is filtered in the Bowman's capsule due to the high hydrostatic pressure by a process known as ultrafiltration.
• The glomerular filtrate when passes through the convoluted tubules, the useful components present in the filtrate are reabsorbed by tubular reabsorption.
• Tubular secretion (movement from the peritubular capillaries into the tubules) is a pathway in addition to glomerular filtration for a substance to gain entry to the tubule.

So, the correct answer is option A.