One job of the kidneys is to
a. regulate the ph of the blood.
b. produce urea from amino groups and ammonia.
c. increase the salt and water balance in the blood.
d. destroy old red blood cells.
any

The best and most correct answer among the choices provided by the question is the first choice "regulate the pH of the blood"

The kidneys are two bean-shaped organs, each about the size of a fist. They are located just below the rib cage, one on each side of the spine. Every day, the two kidneys filter about 120 to 150 quarts of blood to produce about 1 to 2 quarts of urine, composed of wastes and extra fluid.


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