Lipids Flashcards
1
Q
Lipid classes
A
Fatty acids Triaglycerols Phospholipids Glycolipids Steroids
2
Q
Triaglycerols
A
Dietary fuel and insulation (in adipose)
3
Q
Lipid digestion and absorption
A
In small intestine by pancreatic enzymes (lipases) promoted by emulsification by bile salts and peristalsis
4
Q
Lipid transportation
A
Free FA trsnsported through the blood in complex with serum albumin
Most FA esterified - carried in lipoproteins
5
Q
TAGs and cholesterol cannot be transported as free molecules
A
Insoluble in water
6
Q
Carnitine shuttle
A
Major site of regulation
CAT-1 inhibited by malonyl CoA
Prevents synthesis and degradation occurring simultaneously
7
Q
Cholesterol
A
Component of cell membranes Precursor to other substances: Sterol hormones Vitamin D Bile acids
8
Q
Ketone bodies
A
During fasting or starvation, [glucose] decreases
Excess acetyl CoA => ketone bodies
Can fuel brain cells during starvation
Formed in liver
9
Q
Excessive ketones
A
Ketonaemia
Ketonuria
Acidaemia
