fats and lipids

Question 1

are EPA and DHA essential fatty acids

Answer 1

No

are metabolised with D5D and D6D + elongate enzymes

Question 2

can we convert APA to EPA and DHA

Answer 2

yes, but conversion is around 4% EPA and 2% DHA

Question 3

what are phospholipids

Answer 3

cell membrane micelles VLDL, LDL, HDL, chylomicrons and eicosanoids

Question 4

what are eicosanoids

Answer 4

singling molecules ( phospholipids )

Question 5

what are sphingolipids

Answer 5

signal transduction - cell recognition

founds in cell membrane of brain and NS

Question 6

what can alter the saturation by changing the number of =

Answer 6

combination of elongate and sterol Co A desaturase

Question 7

what are key enzymes in lipid production

Answer 7

diacylglycerolcholinephosphotransferase - 45%
acyltransferase- 35%
cholesterol esterase- 15%
ceramidine syntheses - 5%. ( sphingolipid)

Question 8

what is the role of colipase

Answer 8

protein anchoring lipase to lipid

Question 9

lipid esterase

Answer 9

secreted by pancreases,
activated by bile
acts on cholesterol esters

Question 10

phospholipase

Answer 10

cleave phospholipids

activated by trypsin