My husband and I *love* to walk ...for hours and hours, and if we decide to go ahead with this potential trip - I'm going to need good shoes. These days, I have some reasonably good shoes for the most part - but they are 2-3 hour walking shoes, not necessarily good for 6+ hours of tromping around.
In cell biology, selective permeability is the property of a living cell membrane that allows the cell to control which molecules can pass through the membrane, moving into or out of the cell.
Split and merge into it. Answer by Betaclamp. Confidence votes 21.0K. The plasma membrane is selectively permeable because it needs to allow certain things in and certain things out. The plasma membrane is a selectively permeable membrane as it allows the entry and exit of some selected substances only.