The gradual replacement of cartilage and its intercellular substance by immature bone cells and calcium deposit is called ____________.

The combining form " spondyl/o " means. A: flesh, muscle B: calcium C: bone D: vertebra, spine

The treatment sequence for tetany of vitamin D deficiency is:( ) A: control convulsion→calcium supplement→vitamin D B: calcium supplement→control convulsion→vitamin D C: vitamin D→calcium supplement control→ convulsion D: vitamin D→control convulsion→calcium supplement

When KMnO4 is used to determine the content of calcium in calcium salt, the indicator used is methyl orange.

The availability of calcium is highest in which of the following condition? A: The cation exchange capacity is 24 cmol(+)/Kg, while the exchangeable calcium is 12 cmol(+)/Kg B: The cation exchange capacity is 30 cmol(+)/Kg, while the exchangeable calcium is 8 cmol(+)/Kg C: The cation exchange capacity is 8 cmol(+)/Kg, while the exchangeable calcium is 5 cmol(+)/Kg D: The cation exchange capacity is 15 cmol(+)/Kg, while the exchangeable calcium is 6 cmol(+)/Kg