Lipids Digestion 1.1

Question 1

2 essential lipids?

Answer 1

• Acide linoléique (w-6)
• Acide linolénique (w-3)

Question 2

True or False,

We cannot produce omega 3 fatty acids =, but we can synthesize omega-6.

Answer 2

WE CANNOT PRODUCE OMEGA 6 or 3

Can only synthesize omega-9

Question 3

Saturated vs monounsaturated vs polyunsaturated?

Answer 3

Saturés: aucune double liaison dans la chaîne
– Monoinsaturés: 1 double liaison
– Polyinsaturés: >1 double liaison

Question 4

Type and size of palmic acid?

Answer 4

Saturated fatty acid with 16 carbons

Question 5

What does C18:2 (9,12) mean?

Answer 5

acide gras de 18 carbones avec deux liaisons doubles en position 9 et 12

Question 6

What kind of fatty acids are omega 3 and omega 6?

Answer 6

Essential and polyunsaturated

Question 7

What is the main type of fatty acid for energy storage>

Answer 7

Triglycerides:

Réserve d’énergie par excellence

Question 8

4 Phospholipids and their roles

Answer 8

Phosphatidylcholine (Lécithines) -> Principaux phospholipides des membranes cellulaires

Phosphatidylsérine (Céphalines) -> Se retrouve uniquement dans la couche interne des membranes des cellules viables. Peut initier signal d’apoptose si présence dans la couche externe

Phosphatidylinositol -> - Abondant dans la couche interne des membranes - Impliqué dans la signalisation cellulaire
- This is the IP3

Sphingolipides -> important for myelination

Question 9

Terpenoides role?

Answer 9

Les vitamines A, E et K sont dérivés des terpènes

Precursor of Cholesterol

Question 10

Le cholestérol est le précurseur de plusieurs molécules importantes

Answer 10

Sels biliaires
Hormones stéroïdiennes
Vitamine D

Question 11

Sels biliares role and precursor

Answer 11

Made from cholesterol

Important for emulsification → take large lips, make them small (micelles)

Question 12

True or False,

We cannot absorb tryglicerides

Answer 12

True

It has to be broken into a mono-glyceride in order to be absorbed

i.,e
2-monoacylglycérol

The majority of absorbed is 2-monoacylglycérol(72%; exam question,exam question)

Question 13

True or False,

Bile contains powerful enzymes that allow for the emuslsification of fatty acids

Answer 13

FALSE

Pas d’enzymes dans la bile -> creates micelles

Question 14

What is the major site of lipid reabsorption?

Answer 14

Starts in the stomach but major site is the intestin

Question 15

what are micelles mixtes and what is their role?

Answer 15

They are micelles that contain a bunch of products of lipid digestion

They are important for the absorption of lipid digestion products

Question 16

What are acid gras libres?

Answer 16

These are fatty acids that will be **transported in the blood **via the binding to albumin