Calcium is very important to the normal functioning of the body, so it is very important that the plasma Ca²⁺ concentration be well regulated. In which of the following ways does calcium play an important role? A) calcium plays an important role in the absorption of Vitamin D from the digestive tract. B) calcium is important for maintaining the proper excitability of nerves and muscles. C) calcium stimulates osteoblasts to lay down bone. D) both (a) and (b) above. E) all of these answers.

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Quizplus · Accepted Answer

Calcium is crucial for nerve and muscle function, as it helps maintain proper excitability. It does not play a direct role in the absorption of Vitamin D or stimulate osteoblasts.

Calcium Is Very Important to the Normal Functioning of the Body