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MDCAT Biology QUESTION #4239
Question 1
How do the kidneys contribute to maintain normal blood calcium level?
  • By storing excess calcium
  • By reabsorbing calcium and activating vitamin D✔️
  • By secreting calcium directly into the blood
  • By converting calcium into urea for excretion
Correct Answer Explanation
Kidneys reabsorb $\text{Ca}^{2+}$ and activate vitamin D.