The nephron is the functional unit of the kidney. There are more than a million nephrons in the kidney. The primary function of the nephron is to remove waste products from the body. It is responsible for the following functions: filtration, secretion (the movement of elements from the blood into the nephron) and reabsorption (the movement of elements from the nephron back into the blood). Elimination is NOT part of the process of producing urine in the nephron. Correct answer: A
