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-(1) calcium absorption from intestine when vitamin D is present; (2) calcium absorption from intestine when vitamin D is absent
A)Choose this if the first item is greater than the second item.
B)Choose this if the first item is less than the second item.
C)Choose this if the first item is equal or nearly equal to the second item.

Question

Quizplus · Accepted Answer

Vitamin D is essential for calcium absorption from the intestine, so when it is present, calcium absorption is greater. Without vitamin D, the absorption of calcium is significantly reduced. Therefore, option A is the best choice.

Use the Following Key to Choose the Best Answer