Q Question 1 2 / 2 pts Almost all (99%) of the calcium in the body is used to Question 2 2 / 2 pts A person's bone density is highest at around age Question 3 2 / 2 pts What is the oxygen carrying protein of muscle cells? Question 4 2 / 2 pts Keshan's Disease is a result of _____________ deficiency. Question 5 2 / 2 pts Cretinism is due to ___________ deficiency
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