2. Each of the following statements concerning the hyaline cartilage matrix is true,
EXCEPT:
A
– is firm and pliable; B – abounds in elastic fibres; C – contains type II collagen fibrils; D
– is highly permeable; E – is impermeable for immunoglobulins.
3. Each of the following statements concerning the perichondrium is true, EXCEPT:
A
– provides nutrition for cartilages; B – its outer layer is fibrous; C – its inner layer is
cellular; D
– is avascular; E – provides appositional growth of cartilages.
4. Each of the following statements regarding the chondroblasts is true, EXCEPT:
A
– originate from chondrogenic cells; B – are located in the inner perichondrium layer; C –
are arranged in isogenous groups; D
– synthesize the cartilage matrix; E – are capable of
division.
5. Each of the following statements regarding the chondrocytes is true, EXCEPT:
A
– arise from chondroblasts; B – can form isogenous groups; C – are capable of division;
D
– take part in the cartilage matrix synthesis; E – are located in the inner perichondrium
layer.
6. Each of the following statements concerning the periosteum is true, EXCEPT:
A
– contains osteocytes; B – is composed of fibrous and cellular layers; C – contains
osteogenic cells and osteoblasts; D
– provides blood supply to bones; E – provides growth
and repair of bones.
7. Each of the following statements concerning the osteoblasts is true, EXCEPT:
A
– are derived from osteogenic cells; B – are located in the inner periosteum layer; C –
produce the organic portion of bone matrix; D
– possess the ruffled border; E – contain
well-developed rER and Golgi apparatus.
8. Each of the following statements concerning the osteocytes is true, EXCEPT:
A
– produce the organic portion of bone matrix; B – differentiate from osteoblasts; C –
house in their own lacunae; D
– possess narrow cytoplasmic processes; E – maintain
bone homeostasis;
9. Each of the following statements concerning the osteoclasts is true, EXCEPT:
A
– are multinucleated giant cells; B – are located near the blood vessels; C – have the
ruffled border; D
– possess osteolytic activity; E – are derived from osteocytes.
10. Each of the following statements concerning the coarsely bundled bone tissue
is true, EXCEPT:
A
– is a primary immature bone tissue; B – contains thick bundles of collagen fibrils; C –
occurs mostly in adult body; D
– is replaced by lamellar bone tissue; E – is located near
the skull sutures, in tooth sockets, and at insertion sites of tendons.
11. Each of the following statements concerning the osteon is true, EXCEPT:
A
– is a morphostructural unit of the compact bone substance; B – is composed of 4-20
concentric lamellae; C
– contains a central canal; D – is avascular; E – contains
osteocytes in lacunae between lamellae.
12. The bone tissue embryonic origin is:
A
– notochord; B – mesenchyme; C – ectoderm; D – endoderm; E – neural crest.
13. In contrast to the perichondral bone, the endochondral bone contains:
A
– residues of calcified cartilage; B – bone matrix; C – osteoblasts; D – osteocytes; E –
osteoclasts.
14. The epiphyseal plate function is:
A
– formation of the perichondral collar; B – formation of periosteal buds; C – formation of
the cartilage model; D
– calcification of the bone matrix; E – bone growth.
Directions
: one or more of the given statements or completions is/are correct. Choose the
answer: A
– if only 1,2, and 3 are correct; B – if only 1 and 3 are correct; C – if only 2 and
4 are correct; D
– if only 4 is correct; E – if all are correct.
15. The following characteristics of the perichondrium are true: