Exam 3 fat soluable Flashcards
4 characteristics of fat soluble vitamins
They dissolve in lipids
Require bile for absorption
are stored and tissues
and are toxic in excess
Function is very versatile:
- Vision
- Cell development
- Immune Function
- Bone and body growth
- Reproduction
- Healthy body linings and skin
Vitamin A functions
Vitamin A functions
Function is very versatile:
- Vision
- Cell development
- Immune Function
- Bone and body growth
- Reproduction
- Healthy body linings and skin
What are the forms of Vitamin A?
Retinol, Retinal, and retinoic acid
Retinol is a form of vitamin _ and function:
A
Important for transportation and storage in the body
Retinal is a form of Vitamin _ and function:
Vision
Retinoic acid is a form of vitamin _ and function:
Growth gene regulation
Sources of Vitamin A (animal sources)?
Preformed active A: Liver (cows) and enriched milk
Sources of Vitamin A (plant sources)?
Beta-carotene: bright orange fruits and veggies, dark green veggies
Vitamin A deficiency early symptoms
-Night blindness
Vitamin A deficiency late symptoms
Total blindness
dry, cracked skin
decreased immune functions
Vitamin A toxicity is a risk with eating too much ____
liver
Vitamin A toxicity
Leading cause of blindness, overwhelms system
- Danger if Vitamins A taken in supplements
- Hair loss
- Stunted growth
- Liver failure
- Too much beta-carotene
Which toxicity profile?
Leading cause of blindness, overwhelms system
- Danger if Vitamins A taken in supplements
- Hair loss
- Stunted growth
- Liver failure
- Too much beta-carotene
Vitamin A
Vitamin: __ functions
- Promotes bone mineralization – makes calcium and phosphorus available to blood that bathes bones
- Assits in immune function
- DRIs increased for all ages
Vitamin D
Sources of vitamin D
Sunlight
Food sources include: egg yolks, salmon and tuna, enriched milk products
Vitamin D deficiency children:
Rickets (bowed legs)
Vitamin D deficiency everyone
Osteomalacia – soft porous bones, fracture easily
- Certain cancers caused by deficiency
- Factors of too much – skin color, age, precursor
- Certain geographical areas don’t get it year round
- November-April the North of the US doesn’t get enough
Vitimin __ deficiency
Osteomalacia – soft porous bones, fracture easily
- Certain cancers caused by deficiency
- Factors of too much – skin color, age, precursor
- Certain geographical areas don’t get it year round
- November-April the North of the US doesn’t get enough
D
Vitamin _ toxicity occurs at _ times the RDA level
D
5
Vitamin _ toxicity
- Can cause diarrhea, headache, nausea
- Can be deadly
- Not possible with sun exposure.
D
Vitamin D toxicity symptoms
- Can cause diarrhea, headache, nausea
- Can be deadly
- Not possible with sun exposure.
Vitamin _ functions
- Fat-soluble antioxidant
- Protects cell membranes in body tissues and blood
- Participates in immune system
- Steps chain of reaction (caused by free radicals) that damage cells
- DRI based on alphatocopherol
Vitamin E
Vitamin E Food Sources
- Widespread of food
- in many skin products
- Found in all fruits and veggies
Vitamin E functions
- Fat-soluble antioxidant
- Protects cell membranes in body tissues and blood
- Participates in immune system
- Steps chain of reaction (caused by free radicals) that damage cells
- DRI based on alphatocopherol
Fat soluble vitamins include
A, D, E, and K
Vitamin E deficiency is
rare because it’s so widspread.
Usually only see V E deficiency with fat malabsopbtion
ye
Vitamin _ is very reactive and is an antioxidant. This makes it hard to cook with the vitamin in tact
E
Vitamin E toxicity symptoms
- Upset stomach
- rare
- can interfere with medications
Vitamin K functions
Blood clotting and bone formation
Vitamin K sources
Made by intestinal bacteria
- cannot meet needs alone
- green, leafy vegatables
- cabbages
Vitamin _ sources: Made by intestinal bacteria * cannot meet needs alone *green, leafy vegatables *cabbages
K
The only vitamin absorbed in the Colon (instead of small intestine) is
K
K deficiency is rare and children are given injection because
their guts aren’t fully developed
Vitimin k toxicity
is rare but can occur with supplements
