Topics:
Animal Physiology, Animal Refresher
RBCs with Unequal Size — Term
RBCs with unequal size is termed as:
- Anisocytosis — Correct Answer
- Poikilocytosis
- Oligocythemia
- None
Explanation:
Correct Answer: Anisocytosis
Anisocytosis refers to the condition where red blood cells are of unequal or variable sizes (some too large, some too small, some normal).
RBC Morphological Abnormalities — Key Terms
- Anisocytosis: Variable RBC size (aniso = unequal). Seen in iron deficiency anemia, vitamin B12/folate deficiency, regenerative anemia. Measured by RDW (Red Cell Distribution Width) — high RDW indicates anisocytosis.
- Poikilocytosis: Abnormal RBC shape. Includes sickle cells (drepanocytes), spherocytes, elliptocytes, schistocytes (fragmented cells). Seen in hemolytic anemias, iron deficiency, thalassemia.
- Macrocytosis: Abnormally large RBCs (MCV > normal). Seen in B12/folate deficiency.
- Microcytosis: Abnormally small RBCs (MCV < normal). Seen in iron deficiency anemia.
- Oligocythemia: Decreased total number of RBCs.
- Polycythemia: Increased total RBC mass.
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
