205.5.94 - nutrition

The conversion of 25-OH-vitamin-D to the active form, 1,25-diOH-vitamin-D is most directly related to an increase in the uptake of what nutrient in the intestine?

• a. calcium.
• b. chlorine.
• c. chromium.
• d. cobalt.
• e. copper.
• f. fluorine.
• g. iodine.
• h. iron.
• i. magnesium.
• j. manganese.
• k. molybdenum.
• l. phosphorus.
• m. potassium.
• n. selenium.
• o. sodium.
• p. sulfur.
• q. vitamin A.
• r. vitamin D.
• s. vitamin E.
• t. vitamin K.
• u. zinc.