vocab. | def. |
discovering cells | the invention of the microscope made the discovery of the cell possible |
discovering cells | the cell theory states that: all living things are made of cells; cells are the basic units of life; all cells come from other cells |
looking inside cells | the cell membrane protects the cell and controls what substances enter and leave it |
looking inside cells | the nucleus is the cells control center |
looking inside cells | organelles in the cytoplasm perform many vital functions |
chemical compounds in cells | the groups of organic compounds found in living things are carbohydrates, lipids, proteins, and nucleic acids |
chemical compounds in cells | without water, mst chemical reactions within cells could not take place |
the cell in its environment | substances can move into and out of a cell by diffusion,osmosis, or active transport |
the cell in its environment | diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. osmosisis the diffusion of water molecules through a selectively permeable membrane |
the cell in its environment | active transport requires the cell to use energy while passive transport does not |
the cell in its environment | if a cell grew too large, it could not function well enough to survive |