Quiz Mode allows you to practice the quiz as a real exam, you'll have a timer, answers will be hidden, you'll be allowed to fill your answers, get the result at the end and store your results.
For a compound to be classified as a vitamin, it must
For a compound to be defined as a vitamin, it must be a vital, organic, dietary substance that is not a carbohydrate, fat, protein, or mineral and is necessary in only very small amounts to perform a specific metabolic function or prevent an associated deficiency. It also cannot be manufactured by the body in sufficient amounts to sustain life and must be supplemented by the body.
A vitamin that behaves more like a hormone than a vitamin is vitamin
Vitamin D is a prohormone made in the skin by sunlight.
The provitamin form of vitamin A that is found in plant pigments is
Beta-carotene is the provitamin form of vitamin A found in plant pigments. The body converts it to vitamin A, making it a primary source of the vitamin.
Spinach, carrots, and sweet potatoes are good sources of
An important function of vitamin A is to
A deficiency of vitamin A may result in
The active hormonal form of vitamin D is
Two foods that are commonly fortified with vitamin D are
Synthesis of the active hormonal form of vitamin D is the result of the combined action of the
The last organ involved in the production of the physiologically active form of vitamin D is the
The primary function of vitamin D is to regulate the absorption and metabolism of the minerals
A vitamin D deficiency in growing children that results in the malformation of skeletal tissue, especially the long bones, is referred to as
Recommended intakes for vitamin D are difficult to establish because
A toxic level of vitamin D is most likely to result in
The requirement for vitamin E varies by the amount of an individuals
Vitamin E protects membranes because it acts as a(n)
The fat-soluble vitamin responsible for the synthesis of blood-clotting factors by the liver is vitamin
In the past, vitamin A content was listed in International Units (IU); it is now listed in
The hormones that participate in calcium metabolism are
There is a metabolic partnership between vitamin E and
An athlete who increases his or her intake of pasta will also increase his or her need for
An alcoholic is most likely to be deficient in
The three body systems that can be affected by a thiamin deficiency are the _____ systems.
The vitamin that is destroyed by light is
The most important source of riboflavin is
The function of all B-complex vitamins is to
The disease associated with niacin deficiency is
The amino acid that can be converted to niacin in the body is
The vitamin most closely associated with protein metabolism is
Which of the following diets can help ensure adequate and balanced vitamin intake?
The person most at risk for vitamin D deficiency is a
The best food source of folic acid is
A folic acid deficiency induces a form of anemia called _____ anemia.
The B vitamin predominantly found in foods of animal origin is
Vitamin C deficiency is associated with
A 62-year-old woman who smokes one pack of cigarettes a day and whose food intake records reveal a minimal intake of vitamin C foods may be at risk for
An example of a meal high in vitamin C is