Orthopedic MCQs Online Bank - Improve Your Knowledge and Skills

36. Clearance of parathormone occurs mainly through the:

A. Intestines
B. Liver
C. Kidney
D. Parathyroids
E. Thyroid

Answer: B. Liver

Clearance of parathormone occurs mainly through the liver.

37. The C-terminal of pathormone is cleared mainly in the:

A. Intestines
B. Liver
C. Kidney
D. Parathyroids
E. Thyroid

Answer: C. Kidney

The C-terminal of pathormone is cleared mainly in the kidney.

38. The main action of Vitamin D3 is on the:

A. Liver
B. Small intestine
C. Colon
D. Parathyroid gland
E. Thyroid gland

Answer: B. Small intestine

The main action of Vitamin D3 is on the small intestine.

39. Which of the following interferes most with the absorption of calcium from the intestine:

A. Diazepam
B. Chelating agents
C. Ergosterol
D. Heparin
E. Diuretics

Answer: B. Chelating agents

Chelating agents interfere most with the absorption of calcium from the intestine.

40. Phosphorous is absorbed into the body mainly through the:

A. Duodenum
B. Jejunum
C. Cecum
D. Colon
E. Stomach

Answer: B. Jejunum

Phosphorous is absorbed into the body mainly through the jejunum.

41. Which of the following is most likely to interfere with the absorption of phosphorous from the intestines:

A. Antacids
B. Bisphosphonates
C. Fluorine
D. Steroids
E. Heparin

Answer: A. Antacids

Antacids are most likely to interfere with the absorption of phosphorous from the intestines.

42. Which of the following peptide is secreted by the parafollicular cells of the thyroid gland:

A. Parathormone
B. Adrenaline
C. Noradrenaline
D. Calcitonin
E. Ergosterol

Answer: D. Calcitonin

Calcitonin is secreted by the parafollicular cells of the thyroid gland.

43. Which of the following when present, would result in shrinkage of the osteoclast:

A. Calcitonin
B. Parathormone
C. Prednisolone
D. Isoniazid
E. Methotrexate

Answer: A. Calcitonin

Calcitonin, when present, would result in shrinkage of the osteoclast.

44. PTHrP (parathormone related protein) is produced mainly in:

A. The liver
B. The kidney
C. The tumor
D. The lung
E. The parathyroid gland

Answer: C. The tumor

PTHrP (parathormone related protein) is produced mainly in the tumor.

45. Fibroblast Growth Factor 23 (FGF23) is the principal phosphaturic hormone and is produced by:

A. The osteoblast
B. The osteocyte
C. The osteoclast
D. The mesenchymal cells
E. The fibroblast

Answer: B. The osteocyte

Fibroblast Growth Factor 23 (FGF23) is the principal phosphaturic hormone and is produced by the osteocyte.

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Orthopedic MCQs Online Bank - Improve Your Knowledge and Skills