Cartilage And Bone Block 2 Sem-1
- 1.Which of the following statements describes osteoclasts?
- A.
They are enucleated cells.
- B.
They produce collagen.
- C.
They occupy Howship lacunae.
- D.
They are derived from osteoprogenitor cells.
- 2.Which one of the following statements is correct concerning the periosteum?
- A.
It is devoid of a blood supply
- B.
It produces osteoclasts
- C.
) It is responsible for interstitial bone growth.
- D.
Its inner layer contains osteoprogenitor cells.
- 3.Which one of the following statements is characteristic of osteocytes?
- A.
They communicate via gap junctions between their processes
- B.
They contain large amounts of rough endoplasmic reticulum (RER).
- C.
They are immature bone cells
- D.
They are housed as isogenous groups in lacunae.
- 4.Which one of the following statements is correct concerning hyaline cartilage?
- A.
It is vascular.
- B.
It contains type IV collagen
- C.
It undergoes appositional growth only
- D.
It is located at the articular ends of long bones
- 5.A seven-year-old boy is seen by his pediatrician because the child broke his humerus as he tripped and fell while walking. The pediatrician asked about the child's diet and learned that he may have a possible dietary deficiency. Which of the following may be lacking in his diet?
- A.
Potassium
- B.
Calcium
- C.
Iron
- D.
Carbohydrates
- 6.A 22-year-old female patient is seen for the first time by her new physician, who notes that she has very thick bones in her extremities and face. The physician suspects acromegaly, which is a condition caused by which of the following?
- A.
Hypervitaminosis A
- B.
Excess growth hormone
- C.
Hypovitaminosis A
- D.
Hypervitaminosis D
- 7.Which of the following statements is characteristic of bone?
- A.
Bone matrix contains primarily type II collagen.
- B.
About 65% of the dry weight of bone is organic
- C.
Haversian canals are interconnected via Volkmann canals
- D.
Bone growth occurs via interstitial growth only.
- 8.Inhibits histogenesis of cartilage:
- A.
Thyroxine
- B.
Hypervitaminosis A
- C.
Absence of vitamin D
- D.
Hydrocortisone
- 9.Stimulates cartilage histogenesis
- A.
Thyroxine
- B.
Hypervitaminosis A
- C.
Absence of vitamin D
- D.
Hydrocortisone
- 10.Accelerates epiphyseal ossification
- A.
Thyroxine
- B.
Hypervitaminosis A
- C.
Absence of vitamin D
- D.
Hydrocortisone
- 11.Makes epiphyseal cartilage matrix fail to calcify
- A.
Thyroxine
- B.
Hypervitaminosis A
- C.
Absence of vitamin D
- D.
Hydrocortisone
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