The Meaning of the Chrysanthemum Flower. The Chrysanthemum is the flower of the month for November, and this beautiful flower comes with a wide variety of meanings all across the globe. In Asia the chrysanthemum signifies life and rebirth, making them great gifts for birthdays and baby showers. In Europe the chrysanthemum signifies an expression of sympathy.
One of the main roles of a cell membrane is to absorb nutrients from the surrounding environment. In order to do this, the cell membrane must have proteins that detect the presence of molecules that should be taken into the cell.
Like the drawstring opening of a cloth bag, the openings in the cell membrane allow the cell to take in and release fairly large molecules like glucose, as well as ions (atoms with a positive or negative electrical charge) that are unable to pass through the main, lipid-bilayer portion of the membrane.