Multiple Choice
Generally, it is hard to consume toxic quantities of vitamins without supplements. But eating which of the following organs is most likely to result in hypervitaminosis A (toxic levels of vitamin A)?
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7. Vitamins
Fat-Soluble Vitamins
Multiple Choice
Which of the following is NOT a function of vitamin D in the human body?
A
Enhancing intestinal absorption of calcium and phosphorus
B
Supporting bone mineralization and remodeling
C
Regulating gene expression through the vitamin D receptor (VDR)
D
Serving as a primary antioxidant that protects cell membranes from lipid peroxidation
Verified step by step guidance1
Step 1: Understand the primary functions of vitamin D in the human body. Vitamin D mainly helps regulate calcium and phosphorus levels, supports bone health, and influences gene expression through the vitamin D receptor (VDR).
Step 2: Review each option given in the problem and compare it to the known functions of vitamin D. For example, enhancing intestinal absorption of calcium and phosphorus is a well-established role of vitamin D.
Step 3: Recognize that supporting bone mineralization and remodeling is directly related to vitamin D's role in maintaining bone health by regulating calcium and phosphorus balance.
Step 4: Understand that vitamin D regulates gene expression by binding to the vitamin D receptor (VDR), which influences various biological processes.
Step 5: Identify that serving as a primary antioxidant protecting cell membranes from lipid peroxidation is not a recognized function of vitamin D. This role is typically associated with other nutrients like vitamin E.
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