Final answer:
The loss of intrinsic factor causes a deficiency of vitamin B12, which is crucial for red blood cell production and neurological functioning. Pernicious anemia is a common result of this deficiency.
Step-by-step explanation:
The loss of intrinsic factor in gastric acid causes a deficiency of vitamin B12.
Intrinsic factor is a protein secreted by the cells of the stomach that is essential for the absorption of vitamin B12 in the small intestine. Without this intrinsic factor, even if the diet is sufficient in vitamin B12, the body cannot properly absorb the vitamin leading to a deficiency. This can result in conditions like pernicious anemia, where there is poor absorption of vitamin B12 often seen in patients with certain diseases or those who have had parts of their intestines or stomach surgically removed.
Vitamin B12 is necessary for the production of mature red blood cells and normal neurological functioning. Hence, the absence of intrinsic factor and the resulting vitamin B12 deficiency can have serious health consequences.