fAT Flashcards
4 reasons lipids are important in body
Warmth
energy storage
protection
aids intestinal absorption of fat soluble vitamins
2 reasons lipids are important in food
enhance flavour
provide essential fatty acids
what is a phospholipid made up of
glycerol + 2 fatty acids + phosphate
3 functions of phospholipids
energy store
membrane of cells
source of fatty acids
4 functions of cholesterol
structural component of membranes (acts like glue)
steroid backbone
Vitamin D
bile acids
4 functions of fatty acids
major energy source
structural in phospholipid bilayer
membrane fluidity
information molecules
What C can humans not produce a double bond before on fatty acids fromt he methyl end
9th C. so have to consume omega 3 and 6 fatty acids - these are considered essential FA
What % of essential fatty acids should make up the days energy
1-3%
What affect does SAFA have on the body
Increases choleserol - particulary LDL
decrease LDL receptoe activity
What affect to trans fat have on the body
increases cholesterol synthesis
WHat affect does PUFA (n-6) have on body
decreases cholesterol
increases LDL recpetor activity
decreases the PSCK9 which degrades the LDL receptors
What affect does PUFA (n-3) have on the body
Decrease TAGs
increase reverse cholesterol transport
reduces inflammation
What is our overall fat intake relative to guidelines
High side especially saturated and trans
What is some of the theory behind fat diets for athletes
increased fat use as fuel
train a trained individual to use it more as fuel
Disadvantages of fat as fuel source
transporation in blood (has to go vi lymph)
cannot use anaerobically
potential negative health consequences ?????
