Module 3 - Fat Flashcards Preview

LifeSci 2N03 > Module 3 - Fat > Flashcards

Flashcards in Module 3 - Fat Deck (33):
1

what are the three types of fats?

phospholipids
sterols
triglycerides

2

what is the fat in eggs?

lecithin a type of phospholipid

3

lecithin:

two fatty acids, a phosphate group and a molecule of choline make up the phospholipid known as lecithin, lecithin is also an emulsifier

4

what % of dietary lipid intake do phospholipids account for

10%

5

soy can be a substitute emulsifier in place of eggs and may be linked to...

Lower cholesterol

6

one egg yoke contains...

200mg of cholesterol

7

cholesterol is required for:

synthesis of sex hormones, adrenal hormones, bile acids

8

plant sterols

compete with dietary sterols and can reduce absorption of cholesterol

9

How is it that plant sterols and stanols decrease body cholesterol levels?

sterols and stanols decrease dietary cholesterol absorption

10

why is milk and margarine fortified with vitamin D?

because it is only consumed through a short list of foods including fatty fish, eggs, some liver oils,

11

triglycerides

most abundant type of lipid in our diet; glycerol molecule and 3 fatty acid chains

12

unsaturated fatty acids

one or more double bond; liquid at room temp

13

saturated fatty acid

no double bonds; solid at room temp

14

short carbon chains in fatty acids...

can cause a saturated fatty acid to have liquid characteristics at room temperature

15

monounsaturated fat

triglyceride fatty acid with 1 double bond

16

polyunsaturated fat

triglyceride fatty acids with more than 1 double bond

17

coconut oil

mostly saturated fats but also has some monounsaturated and polyunsaturated fats

18

olive oil

monounsaturated fats but also has some saturated fats and polyunsaturated fats

19

fatty acid nomenclature

first number represents number of carbons and second number represents number of double bonds

20

Laurie acid has 12 carbons and is saturated what is the nomenclature

Laurie acid (12:0)

21

trans fatty acid

no known health benefits; naturally found in milk butter and meat but also found in hydrogenated oils

22

omega 6 polyunsaturated fatty acids

needed for cell signalling, epithelial cell function, cell membranes, blood clotting, and are found in eggs, meat

23

omega 3 fatty acid

needed for cardiovascular system, platelet, nervous system function and are found in canola oil, soybean, fish and flaxseed

24

Which of the following statements about fatty acids and/or triglycerides is true?

The length of the fatty acid carbon chain can determine the physical state of a dietary fat.

25

Which of the following helps with breaking down larger triglyceride (TAG) molecules to allow enzymes to access the triglyceride for digestion?

bile

26

After fatty acids and glycerol molecules have been absorbed, they are carried by _________ through the _________.

chylomicrons, lymphatic vessels

27

Chylomicrons

are lipoproteins (lipid + protein molecule) that carry all diet-derived lipids, including triglycerides, sterols (for example, cholesterol) and phospholipids.

28

where is bile made?

liver

29

where is bile stored and released from?

gallbladder

30

describe differences in length of fatty acid chain

longer = less saturated
short - medium - long
butter - coconut - olive oil

31

longer triglycerides are more likely to be stored in...

adipose tissue

32

fat AMDR

20-35% of total kcal from fat

33

fat RDA

there is none because not enough data was available when RDA was written