prokaryotic - an organism whose cells do not have an enclosed nucleus, such as bacteria, eukaryotic - cell with a nucleus (surrounded by its own membrane) and other internal organelles, homeostasis - process by which organisms maintain a relatively stable internal enviornment, cell - basic unit of life, organelle - specialized structure that performs important cellular functions within a eukaryotic cell, nucleus - a part of the cell containing DNA and RNA and responsible for growth and reproduction, membrane - thin, flexible barrier around a cell; regulates what enters and leaves the cell, cell wall - a rigid layer of nonliving material that surrounds the cells of plants and some other organisms, passive transport - the movement of substances across a cell membrane without the use of energy by the cell, diffusion - movement of molecules from an area of higher concetration to an area of lower concentration, osmosis - diffusion of water, selectively permeable - a property of cell membranes that allows some substances to pass through, while others cannot,

Unit 6 Cells and Cell Processes

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