Reference Material:
Okay, to understand what Vitamin D does, we need to understand the central concept. The function of Vitamin D is to maintain blood calcium. You probably think the function of Vitamin D is to maintain strong bones and teeth. But it does that by accident. Its real function is to maintain your blood calcium level in a very narrow range. And the reason for that is if your blood calcium level falls below about 9 milligrams per 100 milliliters, then you’re longing to be in a big trouble, and die rather quickly. And that’s because blood calcium is important for muscle contraction and nerve transmission. And if you don’t have enough of it, you can’t contract muscles normally, There can’t be normal nerve impulses. And this results in a disease called tetany, where you got these uncontrol convulsions followed by rapid death. Calcium is also important for enzymic activities and blood clotting.
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Sample Answer:
This lecture talks about Vitamin D. Its real function is to maintain blood calcium in a narrow range. It will cause trouble If people’s blood calcium level falls below a range, as blood calcium is important for muscle contraction and nerve transmission. Besides, it will cause tetany if people do not have enough of it. Finally, Calcium is important for enzymic activities and blood clotting. (68 words)
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