Question

What type of substance regulate the various function of kidney?

Answer 1

Examples of substances that are excreted are urea, ammonium, and uric acid. The kidneys also carry out functions independent of the nephron. For example, they convert a precursor of vitamin D to its active form - calcitriol - and synthesize the hormones erythropoietin and renin.
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Answer 2

ammonium​,uric acid , potassium and hydrogen are substances which regulate the various function of kidney