A lack of intrinsic factor,leading to a deficiency of vitamin B12 and causing an appearance of large pale cells called macrocytes,is characteristic of ________.
A) polycythemia
B) sickle-cell anemia
C) aplastic anemia
D) pernicious anemia

Question

Quizplus · Accepted Answer

The description of large pale cells called macrocytes is characteristic of pernicious anemia, which is caused by a lack of intrinsic factor that leads to a deficiency of vitamin B12. Polycythemia is an overproduction of red blood cells, sickle-cell anemia is a genetic disorder affecting hemoglobin structure, and aplastic anemia is a condition where the bone marrow doesn't produce enough new blood cells. None of these conditions are characterized by macrocytes or deficiencies in vitamin B12.

A Lack of Intrinsic Factor,leading to a Deficiency of Vitamin