Question

Loss of parietal cells after a gastrectomy may lead to a deficiency of

1: vitamin C.
2: vitamin B12.
3: vitamin E.
4: choline.

Answer 1

Loss of parietal cells after a gastrectomy leads to a deficiency in vitamin B12 due to the absence of intrinsic factor. Vitamin B12 injections are necessary for patients who have their stomach removed to prevent pernicious anemia.

Step-by-step explanation:

The loss of parietal cells after a gastrectomy may lead to a deficiency of vitamin B12. Parietal cells are crucial for producing intrinsic factor, which is necessary for the absorption of vitamin B12 in the small intestine. Without intrinsic factor, vitamin B12 cannot be absorbed, which can lead to the development of pernicious anemia. Vitamin B12 is essential for the production of mature red blood cells and normal neurological functioning. Patients who undergo total gastrectomy can survive with minimal digestive dysfunction if they receive vitamin B12 injections to compensate for this loss.