Q. 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
Explanation
[Solution] Tubular cells actively secrete $H^+$ into the filtrate, making urine slightly acidic. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.