Question Answer
any of a number of organized or specialized structures within a living cell organelles
the semipermeable membrane surrounding the cytoplasm of a cell cell membrane
a microscopic membrane of lipids and protiens that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm plasma membrane
substances outside the cell extracellular substance
substances inside the cell intracellular substance
studies of the arrangements of molecules in the cell membrane have given rise to a model of its structure mosaic model
powerhouse and brain of the cell nucleus