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Cells & Diffusion

Part A

TermDefinition
Nucleus Controls all activities of the cell; growth and reproduction.
Cell Membrane Is made up of a 2 Phospholipid layers interconnected and allows certain molecules to go in our out of the cell; molecules diffuse in or out of a cell
Cell Wall Supports and protects the cell; does not allow molecules in or out.
Chromosomes Proteins that contain DNA which has coded information for making molecules.
Rough Endoplasmic Reticulum Produces and stores proteins.
Smooth Endoplasmic Reticulum Produces and stores fats and oils.
Golgi Bodies Modifies and packages proteins from rough ER with enzymes.
Ribosomes Helps rough ER make proteins; is attached to rough ER.
Centrioles Helps with cell division (mitosis); spindle fibres come from here.
Mitochondria Converts sugar into energy for the cell.
Cytoplasm Fluid in the cell; allows organelles to move around.
Vacuole Stores water, minerals & vitamins; much bigger in plant cells.
Lysosomes Breaks down food, invading bacteria, and old/damaged organelles.
Chloroplasts Uses sunlight to make its own food (Photosynthesis). CO2 + H2O + light --> Sugar + O2
Diffusion The natural movement of molecules from an area of high concentration to an area of a low concentration.
Osmosis The movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
Permeable The ability of a molecule to pass through a membrane.
Semi-permeable Only some molecules can pass through a barrier.
Non-permeable No molecules can pass through a barrier.
Created by: michaelaaa
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