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About 99% of body Ca is present in bones...

About 99% of body Ca is present in bones and teeth as

A

apatatite

B

fluorapatite

C

both (1) and (2)

D

hydroxyapatite

Text Solution

Verified by Experts

The correct Answer is:
C
Bones consist of apatite, `[Ca_(3)(PO_(4))_(2)]` whilee enamel on teeth consists opf fluorapatite, `[3Ca_(3))(PO_(4))_(2).CaF_(2)]`
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R SHARMA-THE S BLOCK ELEMENTS-Follow-up Test 11
  1. A suspension of slaked lime in water is called

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  2. Bleaching powder is prepared by passing chlorine into

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  3. Which of the following changes occur when an excess of CO(2)(g) is pas...

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  4. Limestone rock is the commonest form of calcium carbonate which also o...

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  5. Calcium carbonate, commonly called limestone, is prepared by passing C...

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  6. Which of the following in incorrect for CaCO(3) ?

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  7. Calcium carbonate along with is used as a flux in the extraction of m...

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  8. Calcium carbonate is used as (i) a filler in cosmetics (ii) a cons...

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  9. Plaseter of Paris, a white powder, is

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  10. Plaster of Paris is obtained when gypsum is heated to

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  11. Plaster of Paris has a remarkable property of setting with water. On m...

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  12. The raw materials for the manufacture of Portland cement (or just ceme...

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  13. Cement is essentially a finely powdered mixture of calcium silicates a...

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  14. Which of the following in incorrect ?

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  15. All enzymes that utilize ATP in phosphate transfer require

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  16. The main pigment for the absorption of light in green plants is chloro...

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  17. About 99% of body Ca is present in bones and teeth as

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  18. Ca^(2+) ions play an important role in (i) neuromuscular function ...

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  19. The calcium concentration in plasma is regulated at about mg L^(-1).

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  20. Bone is not an inert and unchanging substance but is continuously bein...

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