Multiple choice

Which body fluid has the lowest pH?

  1. Arterial blood

  2. Stomach acid

  3. Venous blood

  4. Urine

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stomach acid (gastric juice) contains hydrochloric acid and has a very low pH, typically between 1.5 and 3.5, making it significantly more acidic than blood or urine.