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.
semipermeable. adj. 1. (Biology) (esp of a cell membrane) selectively permeable. (ËsÉm iËpÉr mi É bÉl, ËsÉm aÉª-). adj.emipermeable. adj. 1. (Biology) (esp of a cell membrane) selectively permeable. (ËsÉm iËpÉr mi É bÉl, ËsÉm aÉª-). adj.