Chapter 11
Which of the following is a property of the fat-soluble vitamins?
Deficiency symptoms may take years to develop on a poor diet
Which of the following disorders may result from vitamin E deficiency in people?
Erythrocute hemolysis
Which of the following can the body use to synthesize vitamin D?
Exposure to sunlight
Knowing the role of vitamin K in the body, in what organ would you expect to find it in large quantities?
Liver
The first detectable sign of vitamin A deficiency is usually
Night Blindness
Which of the following is a characteristic of vitamin D nutrition?
Prolonged exposure to sunlight degrades the vitamin D precursor in skin, thus preventing vitamin D toxicity
What is/are the main function(s) of vitamin D?
Promotes calcium and phosphorus absorption and promotes calcium mobilization from bone
What form of vitamin A supports vision but not growth?
Retinal
What form of vitamin A supports reproduction but not growth?
Retiniol
Which of the following organs is NOT required for the complete synthesis of activated vitamin D?
Small intestine
Which of the following is a feature of vitamin D?
The average consumption in the United States does not meet the recommended intake
Approximately what percentage of the body's vitamin A stores are found in the liver?
90
With what vitamin is opsin usually associated in the body?
A
What population group is most vulnerable to vitamin A toxicity?
Children
Which of the following compounds serves as the major precursor for the body's synthesis of vitamin D?
Cholesterol
Which of the following is a feature of vitamin K?
Bacteria in the intestines synthesize bioavailable vitamin K
Which of the following food substances can be converted to vitamin A in the body?
Beta-carotene
In what chief capacity does vitamin K function?
Blood Clotting
Why are primary vitamin E deficiencies rarely observed in human beings?
The vitamin is widespread in foods
The main function of vitamin E in the body is to act as a(n)
antioxidant