Which of the following are importannt in controlling the concentration of body water and electrolytes? A. Liver
B. Kidney
C. Lungs
D. Heart

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons