Lipids Flashcards
(21 cards)
How many carbons are in a molecule of cholesterol?
27
What does UC mean?
unesterified cholesterol (free)
What does CE mean?
cholesterol ester
How much of our daily intake of cholesterol comes from what we eat? (exogenous)
25%, roughly 300-500 mg
What percentage of our daily intake of cholesterol is made by our body? (endogenous)
75%, roughly 800 too 1200 mg
How much cholesterol in total is stored in our body?
30-40gm
Where does most of the cholesterol in our body reside?
In our cell membranes?
Which cells in the body can produce cholesterol?
All of them.
Of our body’s “synthesized” cholesterol, what percentage of it is made by the liver?
20
Of our body’s “synthesized” cholesterol, what percentage of it is made by our cells?
80
The synthesis of cholesterol is a complex process with 37 individual steps.
The synthesis of cholesterol is a complex process with 37 individual steps.
The complex process our body goes through to create cholesterol and ensure its levels remain within a narrow band is called what?
cholesterol homeostasis
What happens to excess cellular cholesterol?
It crystallizes and causes cellular apoptosis.
Do plasma cholesterol levels have much to do with cellular or artery cholesterol levels?
No they do not.
What is this process from the Gastroenterology Journal?
How the gut lets in and filters out cholesterol when it is absorbed.
What kind of cholesterol, UC or CE, can be absorbed by the gut?
UC (free)
What percentage of the cholesterol we ingest is esterified?
>50%
What percentage of the cholesterol in our gut is of endogenous origin?
85
Where does the endogenous cholesterol in the gut come from?
The liver
Do we absorb very much exogenous cholesterol?
Not at all.
Is cholesterol good or bad?
It is good!
