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  4. The selective secretion of hydrogen ion, ammonia and potassium into the filtrate takes place mainly in

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Q. The selective secretion of hydrogen ion, ammonia and potassium into the filtrate takes place mainly in

NTA AbhyasNTA Abhyas 2020Excretory Products and their Elimination

Solution:

Functions of PCT:
$1.$ PCT absorbs almost all essential nutrients.
$2.$ PCT absorbs about 70%-80% electrolytes and water.
$3.$ As PCT selectively secretes H+ ions, ammonia and potassium ions into the filtrate and also absorbs HCO3- from it, it maintains the pH and ionic balance of the body fluids.