The cell membrane<span> is selectively permeable to ions and organic molecules and controls the movement of substances in and out of </span>cells<span>. The basic function of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings. It consists of the phospholipid bilayer with embedded proteins.</span>
Metaphase is the process third of mitosis when the chromosomes line up in the middle of the cell due to the spindle fibers pulling them in a single file line. Also the spindle fibers connect to the centromeres. Hope this helps :)