Exam 4. Lipids digestion

Question 1

Lipid absorption channels

Answer 1

Not needed because the cell membrane is made of phospholipids so lipids can just go right through

Question 2

Lipase

Answer 2

The enzyme that digests triglyceride

Question 3

Triglyceride

Answer 3

Lipid molecule that we can digest
Glyceral backbone
3 fatty acid tails

Question 4

Emulsification

Answer 4

Bile emulsifies the lipids and it combines with lecithin

Question 5

Micelles

Answer 5

Transport vesicle formed by bile and lecithin
The outside of vesicle will be hydrophilic
The inside will be hydrophobic
This way the hydrophilic portion can move through the water in the GI tract and the lipid is stored inside the cell within the hydrophobic side
Inside the bubble is where lipase digests triglycerides

Question 6

Triglyceride break down

Answer 6

Inside the micelle, the lipase converts it to monoglyceride and two free fatty acids

Question 7

Brush border and lipid digestion

Answer 7

The micelles get pushed into the brush borders it falls apart
Since the contents are lipid soluble it is able to just go through the membrane
Once in the cell, there is a lot of water.
As soon as it gets into the cell they get place to another vesicle

Question 8

Chylomicron

Answer 8

Vesicle for the lipids once they enter the cell
Inside the monoglycerides and free fatty acids form a triglyceride again
The chylomicron gets exocytosed our of the cell where it gets picked up by lymphatic vessels

Question 9

Lacteal

Answer 9

Lymphatic capillary where the chylomicrons full of triglycerides enter and get dumped into the subclavian veins
From there, they will eventually get to the liver