The gradual replacement of cartilage and its intercellular substance by immature bone cells and calcium deposit is called ____________.
举一反三
- Spaces within bone or cartilage which house the living cells are called( ). A: chondrocytes B: Lacunae C: Osteoclasts D: intercalations E: Cristae
- Paratfollicular cells or C cells of thyroid also secrete calcitonin, which has the function of ( ). A: Enhancing osteoblast activity B: Promoting the conversion of bone calcium into blood calcium C: Promoting calcification of bone tissue D: Reducing blood calcium E: Elevating blood calcium
- Cartilage capsule is ( ) A: loose connective tissue at the surface of cartilage B: dense connective tissue at the surface of cartilage C: space around cartilage cells D: cartilage matrix around cartilage cells E: collagenous fibers around cartilage cells
- The following statements , _____, illustrate the functions of calcium. A: nerve cells need calcium for nerve impulse conduction B: muscle needs calcium to contract C: blood needs calcium to clot D: bone needs calcium to make itself hard
- Isogenous group is A: seen at periphery of cartilage B: seen at periphery of bone C: a group of chondrocytes within a single lacuna D: a single chondrocyte within one lacuna E: a group of immature flattened chondrocytes