Receptor Protein.
channel or transport or receptor protein
A receptor.
Enzyme
Transport mechanisms
Facilitated Diffusion
permeable (has channels/transporters for specific ions/molecules)
A membrane protein that permits the passage of specific substances is selectively permeable. They allow the solvent as specific solutes to pass through.
balls
Enzyme
There are antibodies and cell-surface receptors and enzymes; is there a more specific A. in view?
Transport mechanisms
Polar molecules are effectively charged molecules. It's hard for them to cross the cell membrane because the membrane is comprised of an uncharged phospholipid bilayer. Charged molecules tend to have specific protein channels that allow them to cross the membrane.
Facilitated Diffusion
permeable (has channels/transporters for specific ions/molecules)
A membrane protein that permits the passage of specific substances is selectively permeable. They allow the solvent as specific solutes to pass through.
Why must you do this. WHY
Receptor molecules, or called receptor proteins.
Direct activities of the cell give the function of the cell membrane. Globular proteins create narrow passageways or channels. The nucleus directs the cell's functions.
With a specific channel protein called aquaporins.