Lipoprotein

Definition

Lipoproteins are complex molecules composed of lipids and proteins that function as transporters for fats and cholesterol in the bloodstream. They play a crucial role in cellular processes and metabolic pathways.

5 Must Know Facts For Your Next Test

1. Lipoproteins are categorized based on their density into types such as HDL, LDL, VLDL, and chylomicrons.
2. The protein component of a lipoprotein is known as apolipoprotein.
3. HDL (high-density lipoprotein) is often termed 'good cholesterol' because it helps remove excess cholesterol from cells.
4. LDL (low-density lipoprotein) is often called 'bad cholesterol' due to its association with plaque formation in arteries.
5. Lipoproteins are crucial for the transport of hydrophobic lipid molecules in the aqueous environment of the bloodstream.

Review Questions

• What are the main categories of lipoproteins based on their density?
• Why is HDL considered 'good cholesterol' and LDL considered 'bad cholesterol'?
• What role do apolipoproteins play in the structure and function of lipoproteins?

Related terms

Apolipoprotein: The protein component of a lipoprotein that helps stabilize its structure.

Chylomicron: A type of lipoprotein formed in the intestine to transport dietary triglycerides.

Triglyceride: A type of fat found in your blood used by your body for energy.