Chapter 9 The Fat Soluble Vitamins NUFD 192
Which of the following factors can explain why vitamin D deficiency is on the rise?
increased use of sunscreen products
In the body, vitamin E
is incorporated into chylomicrons, functions as a fat-soluble antioxidant, is used to neutralize free radicals.
What is one contributing factor to the increased risk of fat-soluble vitamin deficiencies worldwide in developed countries?
limitation of exposure to sunlight
Vitamin K deficiency can be caused by
long term use of antibiotics
One reason that fat-soluble vitamins are grouped together is because they
require bile and dietary fat for absorption.
Which visual pigment is formed by the combination of retinal vitamin A and opsin that allows for perception of light?
rhodopsin
What is TRUE about provitamin A? A. It is available in both plant and animal products. B. It is a carrier of proteins. C. It functions as a metabolic enzyme. D. It is bound to fatty acids.
It is bound to fatty acids.
Why are fat-soluble vitamin deficiencies occurring in the developed world?
Rising reliance on fast food has reduced our intake of fruits and vegetables.
Why would vitamin A deficiency cause eye infections and blindness?
Vitamin A maintains epithelial tissues.
What is TRUE about the function of vitamin D?
Vitamin D works with parathyroid hormone (PTH) to increase calcium retention by the kidneys.
What is a function of vitamin E?
Vitamin E neutralizes reactive oxygen compounds to prevent cell damage.
Why vitamin D is known as the "sunshine vitamin"?
It can be produced in the skin by exposure to ultraviolet light.
Which of the following is NOT true about vitamin A deficiency? A It may be caused by insufficient intake of vitamin A, fat, protein, or zinc. B It affects few areas around the world. C It is rare in developed countries. D It is a major cause of blindness worldwide.
It affects few areas around the world
The activation of vitamin K in the body leads to the formation of keratin, which helps maintain blood vessel elasticity.
False
From this figure, what is TRUE about night vision?
The regeneration of rhodopsin is delayed when vitamin A is deficient.
From this figure, how is vitamin K involved in blood clotting?
Vitamin K helps to produce the blood-clotting protein prothrombin.
Which statement is TRUE about the need for dietary supplements?
Women of child-bearing age need extra folate.
In order for vitamin D to be actively formed, which of the following actions is required in the body?
chemical conversion in the liver and kidney to its active form
The process whereby cell changes occur in structure and function leading to specialization is known as cell
differentiation
Which of the following is a fat soluble vitamin? vitamin A riboflavin niacin vitamin B12
vitamin A
Which of the following disease conditions is related to vitamin A's role in maintaining epithelial tissue?
xerophthalmia
Of the following foods, which is the BEST source of vitamin E?
¼ cup of sunflower seeds
