Chem: Lipids Flashcards Preview

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Flashcards in Chem: Lipids Deck (28)
1

what type of bond is between a glycerol & a FA?

ester

2

__ kcal/g

9

3

saturated fatty acids are :

filled with H2
heavy; dense
solid at room temp.
NO carbon-carbon double bonds
Source: lard, butter, coconut & palm oil

4

Monounsaturated FA have?

one carbon-carbon double bond
liquid at room temp
sources: olive oil, olives, peanuts, avocados etc.

5

polyunsaturated FA have?

more than one carbon-carbon double bond
liquid at room temp.
sources: sunflower, corn, cottonseed, linoleic, alpha linoleic

6

Essential FA are the main_ _ of fat?

building blocks
body cannot make on its own

7

linoleic acid

essential
omega-6 FA
found in polyunsaturated veg. oils
18:2

8

when linoleic is absent which FA becomes an essential FA

arachidonic

9

linoleni acid

omega-3 FA
18:3

10

what makes up a triglyceride?

3 FA + glycerol (ester bond)

11

what makes up a phospholipid?

2 FA + glycerol + phosphate derivative
lipid bilayer

12

Arachidonic cox/lox

2 series PG cox
4 series TX lox
doule check***

13

EPA cox/lox

3 series TX
5 series PG
Double check***

14

cholesterol info:

belongs to sterol group
requires ATP, Mg, NADPH

15

cholesterol fxn:

makes cell membranes
bile salts
steroid hormones

16

Precursor molecules for cholesterol?

mevalonate
acetyl coa
squalene
hmg coa reductase
"MASH"

17

chylomicron source? fxn? enzyme?

intestinal mucosa
transports dietary lipids to body
lipoprotein lipase- fats into cells
highest % of triglycerides

18

VLDL source? fxn? enzyme?

liver- APOC-2
transports endogenous lipids from liver to the body
lipoprotein lipase
lowest % of proteins

19

LDL source? fxn? enzyme?

liver- APOB-100
transports cholesterol from liver to the body
highest % of cholesterol

20

HDL source? fxn? enzyme?

liver- APOA-1; APOE
removes excess free cholesterol from the blood
lecithin cholesterol acyl transferase LCAT

21

what does beta oxidation do? where?

cut 2 carbons off at a time to make acteyl CoA for krebs
mitochondria

22

what does beta ox. require? produces? what about odd number of carbons?

carnitine
1 acetyl CoA
final piece would be a 3 carbon long propionyl CoA

23

ketogenesis forms? increases in? ketone bodies?

ketone bodies as a byproduct of beta oxid.
fasting; low carb diet, diabetes, pregnancy
acetoacetate, acetone, hydroxybutrate

24

what is the primary substrate for lipogenesis?

acetyl CoA

25

lipogenesis occurs in? produces? requires? stimulated by?

cytoplasm
FA
acetyl CoA, CO2, NADPH
ATP & insulin stimulates
EPI & glucagon inhibit.

26

intermediate of lipogenesis?

Malonyl CoA

27

which is a ketogenic AA?

Leucine

28

where does digestion of lipases start?

mouth- lingual lipase
SI