Question

which of the following is not a function of the kidney?
control blood volume
regulate ph level
production of vitamin a
excretion of waste products

Explanation:

The kidneys control blood volume by adjusting the amount of water excreted, regulate pH by reabsorbing and secreting ions, and excrete waste products like urea. However, the production of Vitamin A is not a kidney - function. Vitamin A is obtained from diet or produced in other organs through metabolic processes related to carotenoids.

Answer:

Production of Vitamin A