What substance provides buffering against excess hydrogen ions in the urine?
A)Bicarbonate ions
B)Ammonia
C)Urea
D)Sodium ions

Question

Quizplus · Accepted Answer

Ammonia acts as a weak base to accept excess hydrogen ions in urine, thereby providing buffering against acidification. Bicarbonate ions and sodium ions also play a role in buffering against excess hydrogen ions, but they are primarily involved in maintaining the pH of the blood rather than urine. Urea, on the other hand, is a waste product that is excreted by the kidneys and does not provide buffering capacity.

What Substance Provides Buffering Against Excess Hydrogen Ions in the Urine