QuestionSBA
QuestionChoice
This is not the correct answer. Vitamin K is a fat-soluble vitamin that is needed for the synthesis of clotting factors II, VII, IX and X. It does not aid in the absorption of non-ferrous iron.
10027429
d
Vitamin K
QuestionChoice
This is not the correct answer. Vitamin A is a fat-soluble vitamin that is important for the maintenance of the immune system, for vision, and embryological growth and development. It does not aid in the absorption of non-ferrous iron.
10027428
c
Vitamin A
QuestionChoice
This is not the correct answer. Vitamin B12 (cobalamin) is a water-soluble vitamin that is important for DNA synthesis, maintaining nerve function (synthesis of myelin), and in the circulatory system (maturation of red blood cells). It does not aid in the absorption of non-ferrous iron.
10027427
b
Vitamin B12 (Cobalamin)
QuestionChoice
This is the correct answer. Vitamin C (Ascorbic acid) is a water-soluble vitamin that is important for tissue repair and collagen formation, has an important role in the functioning of a normal immune system, and helps to keep iron in the reduced ferrous state. After uptake of iron, it binds to a protein, transferrin, and is absorbed in the duodenum. Transferrin contains the non-ferrous (ferric) iron, Fe3+, and is reduced from Fe3+ to Fe2+ (ferrous) iron in the bone marrow, allowing it to be stored as ferritin. Ferritin is then incorporated into haemoglobin, allowing iron to be stored and released in a controlled manner as needed. As such, vitamin C aids in the absorption of non-ferrous iron by keeping it in the reduced ferrous state which is more soluble and easily absorbable.
10027426
a
Vitamin C (Ascorbic acid)
QuestionChoice
This is not the correct answer. Vitamin D is a fat-soluble vitamin that is important for calcium homeostasis and metabolism. It does not aid in the absorption of non-ferrous iron.
10027430
e
Vitamin D
Concept
Chapter
2693
5977
Digestion and absorption in the small intestine
Topic
149
Gastro-intestinal physiology
17883
What vitamin aids the absorption of non-ferrous (ferric) iron, Fe3+?
a