lipids page 69-79 Flashcards
FAts have to be emulsified to be digested t or f
true
After absorption of fat in _____, resynthesized as TG and
packaged with other fat soluble compounds as
chylomicron (lipoprotein) – chylomicron made in intestine – fed state
SI
Chylomicrons deliver FA to the body via lipoprotein
lipase – especially in __________ _______
muscle and adipose
glycolysis generates CO2, H2O, and ATP t or f
true
Where do extra FA go
to adipose tissue
where does extra glucose go?
fill glycogen stores then makes FA
What is the RDA for fat intake?
there is no RDA
What is olestra?
Synthetic, non-caloric fat replacement, excreted in feces, no calories
What FA chain takes the longest to absorb?
long chain FA
Linolenic acid – 18:3n3 – chain length, total
number of double bonds, first double bond
from methyl end is at position __
3
Chain length, degree of unsaturation – affect
water solubility, melting point, whether _________
liquid or solid
_C – acetic
_C - propionic
2 and 3
4C – _______
butyric
_C, _C, __C – Caproic, Caprylic, Capric in goat milk
6, 8 and 10
12C -_____
lauric
__C – myristic
14
16C – ________
palmitic
18C – ________ – beef, chocolate – studies find
little effect on cholesterol
stearic
Linoleic – 18:2 – omega _
6
Linolenic – 18:3 – omega _
3
Most prevalent saturated fatty aids in the
Western diet are ______(16C) and _________
(18C)
palmitic and stearic
– most prevalent unsaturated fats
are __________ and __________ (18:2). These
fatty acids account for 90% of the fatty
acids in the diet
oleic (18:1) and linoleic
Fats and oils contain ____ kcalories per gram
9
The typical American diet contains about
______ of its energy from fat
34%
What is the major form of lipid in food and in the body?
triglycerides
when would it be called a monoglyceride?
only one fatty acid is attached to he glycerol
when would it be a diglyceride?
two fatty acids are attached to the glycerol
mono and diglycerides are often used as emulsifiers
true
Short-chain fatty acids have fewer than 6 carbons
and remain________at colder temperatures
What is an example?
liquid and milk