Vitamin D increase blood calcium by:
a increasing intestinal absorption of calcium
b. increasing the amount of calcium released from bone if other sources are unavailable.
c. increasing the amount of calcium retained by the kidneys.
d. all of these choices
Ans: d. all of these choices
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A deficiency of riboflavin is referred to as
A. riboflavinitis. B. hyporiboflavin. C. ariboflavinosis. D. primary riboflavin insufficiency.
Which of the following characteristics is not a result of the production of bioengineered crops?
A) increased resistance to rain storms B) increased tolerance to herbicides C) added nutritional value D) increased resistance to diseases and pests
The human body needs vitamin K to ________.
A. release the energy stored in glucose B. form active blood clotting factors C. absorb phosphorus from foods D. synthesize DNA
Which of the following statements is true?
A. Scientists are conducting research on plants to discover more vitamins that are essential for human beings. B. Biotin is a vitamin-like substance for humans. C. Vitamins are classified as being soluble in either alcohol or fat. D. People can survive for years by only consuming formula diets that contain all known vitamins.