Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Organic compounds that are vital to life and indispensable to body functions, but are needed only in minute amounts; noncaloric essential nutrients.
|
Vitamins
|
|
|
Compounds that can be converted into active vitamins. Remember that cholesterol can be converted to Vitamin D with the help of sunlight.
|
Precursors
|
|
|
What are the fat-soluble vitamins?
|
Vitamins A, D, E, K
|
|
|
What are the characteristics of fat-soluble vitamins?
|
-Found in the fats and oils of foods
-Dissolve in lipid -Require bile for absorption -Are stored in the liver and fatty tissues -May be toxic in excess -Can be stored in the body for a long period of time |
|
|
What are the characteristics of water-soluble vitamins?
|
-Absorbed directly into the blood stream
-Body has limited capacity to store these in general -Risk of toxicity is less than the fat-soluble |
|
|
What are the water-soluble vitamins?
|
All the B vitamins and Vitamin C
|
|
|
What is an orange pigment with antioxidant activity and is a vitamin A precursor made by plants and stored in human fat tissue?
|
Beta-carotene
|
|
|
What are the functions of Vitamin A?
|
-Vision
-Immune Defenses -Reproduction -Bone Growth -Gene Expression -Normal Development of Cells |
|
|
What is one of the active forms of Vitamin A made from beta-carotene in animal and human bodies? It is an antioxidant nutrient.
|
Retinol
|
|
|
What two roles does Vitamin A play in eyesight?
|
1. Help in the process of light perception at the retina
2. Help in the maintenance of a healthy, crystal-clear outer window, the cornea. |
