Which of the following is the primary function of the kidneys?

A) Metabolizing and excreting medications.
B) Maintaining fluid and electrolyte balance.
C) Storing and excreting urine.
D) Filtering blood cells and proteins.

Kidneys

A pair of organs in the vertebrates' body that filter waste products from the blood and excrete them, along with water, as urine.

Electrolyte Balance

The maintenance of proper concentrations of minerals in the body, which is vital for numerous physiological functions.

Metabolizing Medications

The process by which the body chemically transforms medications, affecting their efficacy, duration, and elimination from the body.