Bones are hard due to the constant renewal of their matrix. In addition, this bone matrix has in its constitution an organic protein part consistin...
Bones are hard due to the constant renewal of their matrix. In addition, this bone matrix has in its constitution an organic protein part consisting mainly of collagen, and an inorganic part consisting of calcium phosphate crystals, in the form of hydroxyapatite. Based on the text and knowledge about bone tissue, it is correct to say that:
a. The plasticity of bone tissue is due to the replacement of hydroxyapatite crystals by collagen fibers.
b. The bone matrix is formed only by hydroxyapatite crystals.
c. The bone matrix is formed only by collagen fibers.
d. The bone matrix is formed by an organic part consisting mainly of collagen and an inorganic part consisting of calcium phosphate crystals.
e. The bone matrix is formed by an organic part consisting mainly of calcium phosphate crystals and an inorganic part consisting of collagen fibers.
a. The plasticity of bone tissue is due to the replacement of hydroxyapatite crystals by collagen fibers.
b. The bone matrix is formed only by hydroxyapatite crystals.
c. The bone matrix is formed only by collagen fibers.
d. The bone matrix is formed by an organic part consisting mainly of collagen and an inorganic part consisting of calcium phosphate crystals.
e. The bone matrix is formed by an organic part consisting mainly of calcium phosphate crystals and an inorganic part consisting of collagen fibers.
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Ed 
Com base no texto e no conhecimento sobre tecido ósseo, é correto dizer que a alternativa correta é a letra d. A matriz óssea é formada por uma parte orgânica, composta principalmente de colágeno, e uma parte inorgânica, composta por cristais de fosfato de cálcio, na forma de hidroxiapatita.
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