Q.
The selective secretion of hydrogen ion, ammonia and potassium into the filtrate takes place mainly in
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NTA AbhyasNTA Abhyas 2020Excretory Products and their Elimination
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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.