Final exam Flashcards
(205 cards)
Why are omega 3 and 6 FA essential?
Body cannot make double bonda t 3 and 6 carbon
Where can you find omega 3?
fish - salmon is best, then Herring - least mercury
Chart - flaxseed oil +canola is okay
canolaa, soubean, flax, walmut oils, human milk, cold watter fatty fish + fortifified foods
Where can you ind omega 6?
nuts, seeds, whole grains, vegetable ouils, leafy greens
sunflower,corn ouls,
proccessed foods
what is diffeenc ebetween omega 3 and 6 in terms of cooking and storage?
Omega 3’s like flaxseed oil need to be stored in cool and dark place bv there are more usntable but omega 6 like canola cna be heated rly high
What can omega 3 be good for in human body?
heart health, mental/brain health, decreased ubfkammation
When foods are fortified what type of omega 3 are they fortifed wtih ?why is this not great?
Foods like amragrin, yogurt, granola bars.. fortified with omega 3 ALA (alphaliniolenic acid)
DHA and EPA are better bc there are readily useable by body
best soure of omega 3?
Farry fisg then falx and canola
what type of fats are absorbed directly into blood stream?
short chain - <6C
medium chain - 6-12C
waht type fo FA not naturally occurin in many foods? Who are these best for?
Medium chain FA -0 good for atheltes and seniors with malabsorption/ehalth issues
explain how long chain FA are absorbed and transporte din blood?
packaaged into lipopritein (chylomciron) in GI epithelium, absordped intro lymph through alcreal, travels to left subclavian cein and into regular blood circualtion - chylomicron to fat cell where its too bigh to be absorbed so breaks down by enxyems into glycerol and FA which can be abrobed into cell by becoming triglcyerides and store in adipose
reminants liek cholesterol go back to liver and are recylceld into other lipproteins like VLDL which are released in blood
some more triglyc is dropped at fat cells and VLDL becomes LDL (low density - BAD chole)
Some LDL are taken up by apolipoprotein B on cells and metbaoized but there are limited receptors
soem also metabolized by HDL (agin limited)
Leftover LDL in blood oxidize on artery walls - CVD, hight BP, atherosclerosis
waht is in a lipoprotein?
tricglycerides, phospholipids, cholesterol, protein
where is the chylomciron carried before entering the blood stream?
lymph
Once chylomicron is in blood where does it go? What happens here?
travels to fat and msucle cells where enzymes break it down into its parts
what happens to glycerol and fatty acids once it is broken down from chylomicron?
turns back to triglyceride and stored in adipsoe tissue
where do remenatns of chylomicron go
tot he liver
in the liver what are the remenants of the chylomicron first formed into?
new lipoproteins caled VLDLs (very low dens..)
what do VLDLs become?
release trygleceride into fat calles and become LDL *low densoty) bad cholesterol
What happens to LDL’s in blood?
1) some taken up by apolipoprotein B on cells and metabolized - limited recpetors
20 some LDL metabolzied by HDL (good chole) - limited
3) remainder ozidizes on artery walls, CVD + high BP)
- this is wht long chain and very ling are bad!
what can LDL’s be taken up by?
apolipoprotein B
what increases HDL’s the most?
exercise and healthy eating
is cholesterol an essential nutrient?
NO - body makes it naturally
what is the portfolio diet?
developed to decrease choelstreol by having soluble fibre, nuts, plant sterols, sou protein daily
what was portfolio diet created for?
decreasing cholesterol
how much cholesterol for those at risk of CVD? for normal?
<300 not at risk and <200 is u are