Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The plasma membrane and newly synthesized disks are high in cholesterol. Older apical disks are low in cholesterol. This creates a gradation of membrane cholesterol from the basal to apical disks which is represented by the thickness of the line in this diagram.
