What are the two requirements for calcium at concentrations less than 5 mmol/L to be absorbed through the ileum? A) Vitamin C and a receptor site on the surface of the ileum B) Vitamin D₃ and a carrier protein C) Vitamin K and pepsin D) Vitamin B₁₂ and carboxypeptidase

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The two requirements for calcium absorption through the ileum at concentrations less than 5 mmol/L are vitamin D and a carrier protein. Vitamin D helps to increase the absorption of calcium, while the carrier protein transports the calcium across the intestinal wall and into the bloodstream. Vitamin C, vitamin K, pepsin, and carboxypeptidase are not involved in calcium absorption through the ileum.

What Are the Two Requirements for Calcium at Concentrations Less