Final answer:
The incorrect statement regarding erythropoiesis is that the intrinsic factor, necessary for RBC formation, is produced in the kidneys. In fact, it is produced by the stomach and helps with vitamin B12 absorption.
Step-by-step explanation:
The false statement about factors related to erythropoiesis is: Intrinsic factor, which is necessary for RBC formation, is produced in the kidneys. This is incorrect because the intrinsic factor is produced by the stomach's parietal cells, and its role is to facilitate vitamin B12 absorption, which is necessary for proper RBC formation.
The kidney produces erythropoietin (EPO), which is a hormone that stimulates the bone marrow to produce more red blood cells in response to low oxygen levels. Other correct statements include: Erythropoietin produced by the kidney stimulates RBC formation, oxygen deficiency in tissues serves as a stimulus for erythropoiesis, a reticulocyte count over 1.5% of circulating RBCs indicates erythropoiesis is occurring rapidly, and RBCs lose their nucleus and organelles during maturation.