Vitamin D is used to enhance absorption of

Question

BlackTom AI · Accepted Answer

The question asks: Vitamin D is used to enhance absorption of

Option 1: fiber
Reasoning: Fiber absorption is not regulated by vitamin D. Fiber is a plant carbohydrate that is not absorbed efficiently in the small intestine, and vitamin D does not play a role in its absorption. This makes this option inaccurate.

Option 2: phosphorus
Reasoning: Vitamin D does contribute to the absorption of phosphate (phosphorus) in the gut, and this is part of calcium-phosphate homeostasis. However, if the question expects a single best answer based on common teaching, calcium is typically emphasized as the nutrient whose intestinal absorption is most directly and prominently regulated by vitamin D. This option is not incorrect in a broader sense, but it may be considered less the primary association in many exams.

Option 3: iron
Reasoning: Iron absorption is not directly enhanced by vitamin D. Iron metabolism involves other factors such as hepcidin, transferrin, and enhancers/inhibitors like vitamin C and phytates. This makes this option incorrect.

Option 4: calcium
Reasoning: Vitamin D enhances intestinal absorption of calcium by upregulating calcium-binding proteins in the intestinal lining, which increases calcium uptake from the gut. This is a well-established and central function of vitamin D and directly supports bone health and calcium homeostasis. This option correctly identifies calcium as the nutrient whose absorption is augmented by vitamin D.

Overall, while vitamin D has roles in the absorption of both calcium and phosphate, the most direct and widely emphasized connection in many educational contexts is calcium. The other options do not align with the primary established role of vitamin D in promoting nutrient absorption.

Vitamin D is used to enhance absorption of

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Vitamin D is used to enhance absorption of

View Explanation

Log in for full answers

Similar Questions

​Comprehension-Level Multiple-Choice Items A person’s absorption of calcium varies based on:​

What is the primary function of Vitamin D?

For which of the following functions is Vitamin D is important?

Oxalic acid, a component of fiber, can inhibit the absorption of

Which of the following factors in food exclusively decrease calcium bioavailability? Check all that apply.

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

More Practical Tools for Students Powered by AI Study Helper

Making Your Study Simpler

Comprehension-Level Multiple-Choice Items A person’s absorption of calcium varies based on: