10-Composition of Lipids Flashcards
what are lipoproteins
large droplets of lipid surrounded by a thin shell of phospholipid, cholesterol, and protein
types of lipoproteins
- chylomicrons
- VLDL
- LDL
- HDL
- Apoliprotein A and B
where are chylomicrons produced
intestinal cells
what enzyme breaks down triglycerides into fatty acids and glycerol
lipoprotein lipase
what is apoliprotein
lipoprotein attached to surface of lipoprotein that helps in binding to receptor
where are VLDL found
liver
what happens when the cholesterol content becomes higher then the triglyceride content in VLDL
become LDL
what are the two LDL pathways
1–LDL receptor way (60-70%)
2–Scavenger pathway (30-40%)
what is the reeceptor pathway for LDLs
LDL endocytosed via cholesterol receptors
how is LDL taken in by cells through the scavenger pathway
uptake my macrophage cells
what happens when macrophages become overloaded by cholesterol
they become foam cells
where is HDL produced in the body
liver and intestine
