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.
The movement of macromolecules such as proteins or polysaccharides into or out of the cell is called bulk transport. There are two types of bulk transport, exocytosis and endocytosis, and both require the expenditure of energy (ATP). In exocytosis, materials are exported out of the cell via secretory vesicles. In this process, the Golgi complex packages macromolecules into transport vesicles that travel to and fuse with the plasma membrane. This fusion causes the vesicle to spill its contents out of the cell. Exocytosis is important in expulsion of waste materials out of the cell and in the secretion of cellular products such as digestive enzymes or hormones. Endocytosis, on the other hand, is the process by which materials move into the cell. There are three types of endocytosis: phagocytosis, pinocytosis, and receptor-mediated endocytosis. In phagocytosis or âcellular eating,â the cellâs plasma membrane surrounds a macromolecule or even an entire cell from the extracellular environment and buds off to form a food vacuole or phagosome.