7-21. Osteoblasts take part in: a. formation of the bony tissue
7-22. There is an electron photomicrograph of a cell of developing bony tissue. Around the cell one can see collagen fibres. The cytoplasm of the cell contains well developed granular endoplasmic reticulum. What do we call that cell: b. osteoblast
7-23. Bone cells that are not able to divide; they have small body and numerous processes: b. osteocytes
7-24. There is an electron photomicrograph of a bone cell. Processes of the cell are situated in small canaliculi. Its cytoplasm contains pooly developed endoplasmic reticulum and Golgi complex. What do we call that cell: a. mature osteocyte
7-25. Osteocytes participate in: e. maintenance of the homeostasis of organic and mineral composition of the osseous tissue
7-26. Large polynucleated cells different in shape that contain ruffled membrane and numerous lysosomes; those cells are responsible for absorption and destruction of bone and calcified cartilage: e. osteoclasts
7-27. Osteoclasts take part in: c. removal of bone and calcified cartilage
7-28. Osteoclasts arise from: b. monocytes
7-29. There is an electron photomicrograph of a bone cell. In the cytoplasm of the cell one can see a large number of lysosomes. What cell is it: d. osteoclast
7-30. Tissue that is situated within cranial sutures and within the places of attachment of tendon to bone: e. woven bone
7-31. Intercellular substance of the woven bone is characterized by: a. irregular arrangement of the bundles of collagen fibres
7-32. Intercellular substance of the lamellar bone is characterized by: b. parallel arrangement of collagen fibres
7-33. Interstitial lamellae of the diaphysis of compact bone are situated between: a. osteons
7-34. Endochondral ossification of the cartilaginous primordium of tubular bone begins as: b. deposition of lamellar bone within cartilaginous primordium
