Which of the following organs regulates the levels of water, salts, hydrogen ions, and urea in the mammals? by Sunday | Sep 5 | Biology JAMB | 0 comments A. Kidney B. Colon C. Bladder D. Liver Correct Answer: Option A – Kidney Users Also Read These:When an axon is at rest, the concentration of ions…Which of the following organs regulates the levels…A tap supplies water at 26°C while another supplies…Which of the following organs in mammals is not…In which of the following transitions is the largest…