Question
In the blood smear of a patient given below, the color of erythrocytes marked by a black arrow is mainly because of presence of?
A. Residual RNA.
B. Residual DNA.
C. Reduction in oxygen tension.
D. PH.
Show Answer
|
Correct Answer » A
Explanation
|
|
Ans: A. Residual RNA.
The Cells pointed by the arrow in the image shows Polychromatophilic Erythrocytes
Polychromatophilic Erythrocytes
- They are slightly immature, non-nucleated red cells (reticulocyte stage) appear blue-gray on Wright-stained smears due to the presence of residual ribonucleic acid (RNA).
- These cells are frequently larger in size than mature red cells and can be distinguished from macrocytes by their distinctive blue-gray color.
- Increased numbers of these cells indicate increased red cell output by the bone marrow.
- If stained with a supravital stain, they would be identified as reticulocytes.
