Each is a physiologic role of vitamin D,except one.Which is the exception?

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Vitamin K,not D,functions as a catalyst for synthesis of blood-clotting factors.The remaining selections are physiologic roles of vitamin D.Hematopoiesis is the formation of red blood cells.The regulatory role of vitamin D helps keep serum calcium in an appropriate range to maintain cardiac and neuromuscular function.The hormone actions of vitamin D are integral to protecting immune responses.

Each Is a Physiologic Role of Vitamin D,except One