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:Which of these organs can be considered vestigial in…A hydrogen chloride gas reacted with oxygen gas to…When an axon is at rest, the concentration of ions…Water waves have a wavelength of 3.6cm and speed of…In which of the following transitions is the largest…