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Biology

Part 1 (Cells and diffusion)

TermDefinition
Nucleus - Control all activities of the cell; growth and reproduction.
Cell membrane - Allows certain molecules to go in or out of the cell. - Molecules diffuse in or out of a cell. - Made up of 2 phospholipid layers interconnected .
Cell wall - Supports and protects the cell; does not let molecules in or out.
Chromosomes - Proteins that contain DNA which has coded information for making molecules .
Rough Endoplasmic Reticulum - Produces and stores proteins.
Golgi Bodies - Modifies and packages proteins from rough ER with enzymes.
Ribosomes - Helps rough ER make proteins . - Attached to Rough ER.
Centricules - Helps with cell division (mitosis) - Spindle fibers come from here.
Mitochondria - Converts sugar into energy for the cell.
Cytoplasm - Fluid in the cell; allows organelles to move around.
Vaculole - Stores water, minerals and vitamins. - Much bigger in plant cells.
Lysosomes - Breaks down : food, invading bacteria, old damaged cells/organelles.
Chloroplasts - Uses sunlight to make it's own food. - Photosynthesis. - CO2 + H2O+ light -> sugar + O2
Diffusion - Movement of molecules from areas of (high concentration) to (low concentration).
Premeable - Allows any molecules to diffuse across membrane.
Semi - permeable - Allow certain molecules to diffuse across membrane.
Non - permemable - Allows no molecules to diffuse across membrane.
Osmosis - Movement of water molecules from high concentration of water to low concentration of water.
Smooth Endoplasmic reticulum - Produces and stores fats and oils.
Created by: Lydia27
 

 



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