How are steroids able to cross cell membranes and enter cells?
A) Steroids and cell membranes both contain receptor proteins.
B) Steroids are able to pass through the phospholipid bilayer.
C) Steroids can diffuse through open channel proteins in the membrane.
D) Steroids move through cell membranes by osmosis.

Question

Quizplus · Accepted Answer

Steroids are lipid-soluble molecules that can easily diffuse through the phospholipid bilayer of the cell membrane. This is because the structure of steroids is similar to that of phospholipids, which make up the majority of the cell membrane. Therefore, when steroids encounter the cell membrane, they can simply pass through it without the need for a specific transport protein or channel.

How Are Steroids Able to Cross Cell Membranes and Enter