Cell membranes contain a central bilayer formed by lipids. This protect that membrane.
The answer is High-density lipoprotein or HDL. One of the critical elements of HDL is to transport cholesterol from the cells and tissue back to the liver. High HDL-cholesterol is great as it removes cholesterol from cells and the blood and averts overabundance cholesterol. HDL likewise expels cholesterol stored in the dividers of veins.
Answer:
1. Active
2. Passive
Explanation:
Active is high and passove is low
