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Cells and Diffusion
Part A:
Term | Definition |
---|---|
Nucleus | - Controls all activities of the cell; growth and reproduction. |
Cell Membrane | - Allows certain molecules to go in our out the cell. - Molecules diffuse in or out of a cell. - Made up of a 2 phosphorus layers interconnected. |
Cell Wall | - Support 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 protein. |
Smooth Endoplasmic Reticulum | - Produces and stores fats and oil. |
Golgi Bodies | - Modifies and packages proteins from rough ER (Endoplasmic reticulum) with enzymes. |
Ribosomes | - Helps rough ER (Endoplasmic Reticulum) make proteins - Is attached to rough ER (Endoplasmic Reticulum) |
Centrioles | - Helps with cell division (mitosis) -Spindle fibres come from here |
Mitochondria | - Converts sugar into energy |
Cytoplasm | - Fluid in the cell; allows organelles to move around |
Vacuole | - Stores water, minerals, and vitamins - Much bigger in plant cells |
Lysosomes | - Breaks Down - Food - invading bacteria - old damaged organelles |
Chloroplast | - Uses sunlight to make its own food - Photosynthesis--> Co2 + H20 + Light --> Sugar + O2 |
Diffusion | - Movements of molecules from areas of high concentration to low concentration. |
Osmosis | - Movement of water molecules from high concentration of water to low concentration of water. |
Permeable | - Allows only molecule to diffuse across membrane. |
Semi-permeable | - Allows certain molecules to diffuse across membrane |
Non-permeable | - Allows no molecules to diffuse across membrane. |