In the process of RBC formation,the extrinsic factor is ___,and the intrinsic factor is produced by the ___.
A)vitamin B12/stomach lining
B)vitamin C/liver
C)vitamin B12/liver
D)vitamin C/stomach lining

Question

Quizplus · Accepted Answer

In the process of red blood cell formation or erythropoiesis, the extrinsic factor is vitamin B12, which is required for maturation of red blood cell precursors in the bone marrow. The intrinsic factor is produced by the stomach lining, and it is required for the absorption of vitamin B12 from the intestine. Therefore, vitamin B12 deficiency due to lack of intrinsic factor secretion can lead to pernicious anemia, characterized by reduced RBC formation. Vitamin C is required for collagen synthesis and is not directly involved in RBC formation.

In the Process of RBC Formation,the Extrinsic Factor Is ___,And