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Cells & Diffusion

Gr 10 Biology (Part A)

TermDefinition
Nucleus Controls all activities s of the cell; growth and reproduction.
Cell Membrane Allows certain molecules to go in or out of the cell. Its molecules diffuse in or out of a cell, and it is make up of 2 phospholipid layers interconnected.
Cell Wall Supports and protects the cell; does not allow molecule in or out.
Chromosomes Proteins that contain DNA which has coded info 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 Attached to rough ER and helps it make proteins.
Centrioles Helps with cell division (mitosis) and spindle fibres come from here.
Mitochondria Converts sugar into energy for the cell.
Cytoplasm Fluid in cell that allows organelles to move around. Separates cell membrane and the nucleus. Includes cytosol, organelles, life-supporting materials such as sugar & water.
Lysosomes Breaks down food, invading bacteria, and old/damaged organelles.
Vacuole Stores water, minerals & vitamins; much bigger in plant cells.
Chloroplasts Uses sunlight to make its own food (photosynthesis).
Diffusion The movement of molecules from areas of high concentration to low concentration.
Osmosis The movement of water molecules across a semi-permeable membrane from a high concentration of water to low concentration of water.
Permeable Allows any molecule to diffuse across membrane.
Semi-permeable Allows certain molecule to diffuse across membrane. (ex. skin)
Non-permeable Allows no molecule to diffuse across membrane. (ex. cell wall)
What is the equation for chloroplast? CO2 + H20 + light --> sugar + O2
Created by: demizq
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