Rheumatoid Arthritis Quiz

#8. Which protein, unique to bone matrix, is measurable in serum and serves as a specific marker of osteoblast activity?

A) Fibronectin
B) Albumin
C) Osteocalcin
D) Thrombospondin

Your Answer (0–5):

#10. A patient with a pathological fracture undergoes bone biopsy. Histology shows haphazardly arranged collagen fibres. This pattern is always abnormal in adults because it indicates:

1. Lamellar bone re-modelling
2. Primary spongiosa
3. Endochondral ossification
4. Woven bone formation

Your Answer (0–5):

Bone matrix is 65% mineral. If a bone biopsy specimen weighs 4 grams, how many grams represent the mineral component?
Answer in 1 decimal

Your Answer:

Bone matrix is 35% osteoid and 65% mineral. What is the ratio of mineral to osteoid?

Your Answer:

If 10% of the skeleton is remodelled annually, what fraction of the skeleton is remodelled every month?

Your Answer: