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.
With respect to the exterior of the cell, typical values of membrane potential range from â40 mV to â80 mV. All animal cells are surrounded by a membrane composed of a lipid bilayer with proteins embedded in it. The membrane serves as both an insulator and a diffusion barrier to the movement of ions. Ion transporter/pump proteins actively push ions across the membrane and establish concentration gradients across the membrane, and ion channels allow ions to move across the membrane down those concentration gradients.