What are the functions of lipidS?
Fuel source
energy supply
insulator/cushion
Growth and Regularity
Supply essential nutrients
food satiety
What lipids?
A broad range or organic molecules that dissolve easily in organic solvents but are much less soluble in water
A broad range of inorganic molecule that dissolve easily in inorganic solvents but are much less soluble in water
What are the following indicators of Fuel Source ?
Energy is stored in bodies as fat (built in reserve)
15-20 % healthy men
18-25% women
All the above
TPN stands for Total Packaging Nutrition
15 to 30% of person's body weight/visceral fat tissue remaining relatively inert is an indicator of which lipid function
Food safety
Insulator/Cushion
Supply Essential Nutrients means
fats soluble vitamins
essential fatty acids
cholesterol
all the above
Food Satiety provides flavor and texture to food
What are the 3 classes of lipids?
Sterols, Phospholipids, Monosaccharides
Triglycerides, Sterols, Phospholipids
Phospholipids play a big role in what?
Adipose tissue
Cell membrane
Muscular tissue
Triglycerides are
fat stored in body chemically
source of energy
Indicators of flavor, texture, KCalories
A Fatty Acid is made of organic compound and 20 fatty acids.
A glycerol molecule is not always the same size and the size/shape is not altered by fatty acids.
"Ol" means
sugar
alcohol
Chain length and Degree of Saturation is what classification of?
Fatty Acids
Triglycerides
Lipids
The degree of saturation is composed of what?
Saturated
Unsaturated
Monosaturated
Polysaturated
Length of chain in fatty acids....
affects the ease with which fats are absorbed from the intestinal tract
Have short chain (SCFA)- less than 6 C
have medium chain (MCFA)- 6 to 12 C
have long chain (LCFA)- More than 12 C
Carbon has to bond to 4 different things.
Saturated fatty acids are from vegetable sources except coconut oil and are liquid at room temperature.
Essential F.Acids can be produced by the body and doesn't come from the diet
This fatty acid is implicated in raising blood cholesterol levels
essential
trans
omegas
Trans-fatty acids describe location of the C atoms
Good sources of Omega-3's are:
tuna
spinach
mackerel
trout
avocados
salmon
herring
Almonds
Blood platelets thickness (prevents artery blockage) is reduced by which fatty acids.
Trans
Cholesterol
Omega-3
Cholesterol can come from the liver
Cholesterol....
manufactures hormones
manufactures Vitamin D
Structural component
Nerve Impulses
<200 mg/dl of cholesterol is high
Phospholipids are in the diet
The lipid that contain both glycerol and fatty acids is Cholesterol.
Phospholipids...
help lipids move in and out
pass to soluble vitamins
contain group and choline in place of f.acids
cluster of lipid and proteins
Lecithin is the best known phospholipid associated with which food?
milk
nuts/seeds
eggs
Lipoproteins are consisted of
chylomicrons
VLDL
LDL
HDL
cluster of lipids and proteins
Chylomicrons are formed in the intestinal wall that has lipid/proteins traveling removing the TRIG so the cells get smaller and the liver picks up remnants to build VLDL
Very Low Density Lipoproteins are what.
assembled in liver and intestines
get smaller
composed mostly in TRIG
2/3 fat to low density
remove TRIG to shrink to become LDL (cholesterol rich)
Low Density Lipoproteins are chief carriers of cholesterol
High Density Lipoproteins is produced by the liver and gallbladder.
HDL is high in protein and cholesterol
Exercise lowers HDL.
<7 to 30% of unsaturated fat is the recommended daily intake.
Less than <300mg cholesterol daily is the ideal
Sources of fat:
visible
saturated
invisible
