Tubular secretion

2015 AIPMT-II 1 question

1. 1 Excretory Products and their Elimination
   Human urine is usually acidic because:
   A hydrogen ions are actively secreted into the filtrate B the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries C excreted plasma proteins are acidic D potassium and sodium exchange generates acidity
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