Dentosphere : World of Dentistry

# Poikilocytosis is related to which feature of RBC ? A. Size B. Shape C. Number D. Colour The correct answer is: B. Shape. Variations in red cell shape is called poikilocytosis. Poikilocytosis suggests a defect in the maturation of red cell precursors in bone marrow or fragmentation of circulating red cells. Ref: Harrison’s 18th Ed. 450

# Anisocytosis is related to which feature of RBC ? A. Size B. Shape C. Number D. Colour The correct answer is A. Size. Variations in red cell size is called anisocytosis. Ref: Harrison’s 18th Ed. 450

# If palmar creases are lighter in color than surrounding skin, hemoglobin level is usually ? A. < 10 g/dL B. < 8 g/dL C. < 6 g/dL D. < 4 g/dL The correct answer is B. < 8g/dL. If the palmar creases are lighter in color than the surrounding skin with hyperextended hand, the hemoglobin level is usually < 8 g/dL.   Ref: Harrison’s 18th Ed. 449

# Erythropoietin is produced and released by ? A. Glomerular capillaries B. Proximal tubular cells C. Peritubular capillary lining cells of kidney D. All of the above The correct answer is C. Peritubular capillary lining cells of kidney. Physiologic regulator of RBC production, glycoprotein hormone EPO, is produced & released by highly specialized epithelial-like peritubular capillary lining cells within kidney. Ref: Harrison’s 18th Ed. 448