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6 functions of dietary fats
-major energy source
-maintain body temperature
-protect body organs
-aids in delivery and absorption of fat soluble vitamins and carotenoids
-contributes to the sensory appeal of foods
-influences the texture of foods
3 types of lipids
Description of triglycerides
-3 fatty acids attached to a glycerol backbone
(Triglycerides) in what 3 ways can fatty acids vary in?
4 functions for fatty acids
-regulators of adipogenesis
Which type of lipids provides the most energy in dietary fats?
(classified based on saturation level) what is saturated
no double bond
(classified based on saturation level) What is monounsaturated?
contains one double bond
(classified based on saturation level) what is polyunsaturated?
contains more than one double bond
Polyunsaturated)what are the 2 essential fatty acids?
Polyunsaturated) what is the g/day requirement for men and women?
17 for men and 12 for women
Polyunsaturated) What is the g/day for men and women for alpha-linoleic acid?
1.6 for men and 1.1 for women
Polyunsaturated) what 2 things does CLA do?
-may decrease the uptake of lipids by adipocytes and
-inhibit atherogenesis and carcinogens
Which 2 ways can fatty acids be classfied in terms of shape?
which 2 ways can fatty acids be classified in terms of chain length?
-determines method of digestion and absorption
-properties and function of lipd
what is hydrogenation?
addition of hydrogen to unsaturated fat
what is the result of hydrogenation?
causes formation of trans fats
What occurs to the unsaturated fats when exposed to hydrogenation?
they take on saturated properties
what 3 things compose a phospholipid?
-2 fatty acid chains
3 functions of phospholipids
Do sterols have fatty acids?
Which is the most common sterol?
Whats the shape of the structure of a sterol?
ringed molecular structure
what is the only source to acquire cholesterol?
3 components of cholesterol
what do high levels of LDL do?
increase the risk for CVD
5 ways of lowering cholesterol
-limit saturated fat intake
-keep daily cholesterol intake <300 mg
-limit trans fat intake
-maintain active lifestyle
-increase fruit and veggies intake
(artificial fats) Which fat is carbohydrate derived?
(artificial fats) Which fat is protein derived?
(artificial fats) 2 specialty fats
Under which percent should athletes not go below in consumption of fats
what percent range should fats make up total calories?
3 consequences of low fat intake
-may not meet energy demands
-could develop deficiencies of essential fatty acids and fat soluble vitamins
*may also compromise intake of calcium,iron, zinc
-mentrual dysfunctions in females and low serum in males