Question

17. During urine formation, the tubular cells secrete
substances like H+, K+ and NHz into the filtrate,
this process is called
(1) Ultrafiltration
(2) Tubular reabsorption
(3) Tubular secretion
(4) Glomerular filtration​

Answer 1

Answer:

your answer is

Explanation:

option 2 i.e. tubular reabsorption

Answer 2

Answer:

During urine formation, the tubular cells secrete substances like H+, K+ and NH3 into the filtrate, this process is called Tubular Secretion.

Explanation:

• Urine formation includes three steps – Ultrafiltration, Selective reabsorption and Tubular secretion.
• For tubular secretion, proximal convoluted tubule (PCT) and distal convoluted tubule (DCT) are the major parts.
• PCT & DCT both absorbs all the wastes which has to be secreted from peritubular capillaries.
• PCT – by glandular cells absorbs wastes from peritubular capillaries through blood and pour it into nephric filtrate.
• PCT absorbs excess of H+ ions, hippuric acid. NH3 drugs and creatine from blood and then pour this into filtrate.
• DCT helps in removal of excess of bicarbonate ions, H¬+ ions, NH4 ions and K+ ions.

Hence, option 3 tubular secretion is the process through which the tubular cells secrete substances like H+, K+ and NH3 into the filtrate.

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