The bones,kidneys,and intestine are target organs of this calcium-regulator hormone. A) T₃ and T₄ B) PTH C) ACTH D) Oxytocin

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PTH, or parathyroid hormone, is the calcium-regulator hormone that primarily acts on bones, kidneys, and intestines. It works to increase calcium levels in the blood by stimulating bone resorption, decreasing calcium excretion by the kidneys, and increasing calcium absorption by the intestines. T₃ and T₄ are not known terms or hormones, and ACTH and oxytocin are not relevant to calcium regulation.

The Bones,kidneys,and Intestine Are Target Organs of This Calcium-Regulator Hormone