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141 .
Which major mineral functions as Bone and tooth formation, Blood clotting, Nerve impulse transmission muscle contraction ?
| A. | Iron | B. | Zinc |
| C. | Calcium | D. | None of these |
142 .
Bone has two types of cells what are they -
| A. | osteoblast | B. | osteoclast |
| C. | all of the above | D. | none of these |
143 .
Which bone cell secrete collagen and then pull calcium and phosphorus from the blood to form a hardened material that provide structure of bone ?
| A. | Osteocalst | B. | Osteoblast |
| C. | both (a) and (b) | D. | none of these |
144 .
Which bone cell breaks down hardened materials, releasing calcium and phosphorus into the blood ?
| A. | osteoclast | B. | osteoblast |
| C. | all of the above | D. | none of these |
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