<s>[INST] What does it mean when a cell is permeable, does it have anything to do with what a cell is used for once its fully developed? [/INST] In basic terms, cell permeability means some compounds can enter and leave the cell. It is an essential property, enabling metabolism and intercellular communication.</s>\ <s>[INST] How does it let cells communicate with each other? [/INST] Cells of organs and tissues commonly communicate with one another via permeable membrane junctions. Cell-to-cell channels, spanning the width of both membranes of a junction, are thought to provide pathways between adjacent cells which allow for the exchange of ions and small molecules, allowing neighboring cells to communicate.</s>