Final answer:
Atrophic gastritis may lead to a deficiency of intrinsic factor due to a decrease in gastric acid secretion. Without intrinsic factor, individuals may develop pernicious anemia.
Step-by-step explanation:
Atrophic gastritis may lead to a deficiency of intrinsic factor due to a decrease in gastric acid secretion. Intrinsic factor is secreted by the stomach and is required for the absorption of vitamin B12 in the small intestine. Without intrinsic factor, individuals may develop pernicious anemia. This deficiency can have serious consequences for red blood cell production and neurological functioning.