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Presentation 1 cell structure and function
 

Presentation 1 cell structure and function

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    Presentation 1 cell structure and function Presentation 1 cell structure and function Presentation Transcript

    • Cell Structure and Function
    • Cell Theory
      • All living things are made up of cells.
      • Cells are the smallest working units of all living things.
      • All cells come from preexisting cells through cell division.
    • Definition of Cell A cell is the smallest unit that is capable of performing life functions.
    • Examples of Cells Amoeba Proteus Plant Stem Red Blood Cell Nerve Cell Bacteria
    • Two Types of Cells
      • Prokaryotic
      • Eukaryotic
    • Prokaryotic cell
      • Do not have internal structures surrounded by membranes
      • Few internal structures
      • One-celled organisms, Bacteria
    • Prokaryotic cell
    • Eukaryotic cells Plant cell Animal cell
      • Contain organelles surrounded by membranes
      • Most living organisms
    • Eukaryotic cells Plant cells (onion cells) Animal cell (Amoeba)
    • Organelles
    • Cell Membrane
      • Outer membrane of cell that controls movement in and out of the cell
      • Double layer
      http://library.thinkquest.org/12413/structures.html
    • Cell Wall
      • Most commonly found in plant cells & bacteria
      • Supports & protects cells
    • Nucleus
      • Directs cell activities
      • Separated from cytoplasm by nuclear membrane
      • Contains genetic material - DNA
    • Nucleus
    • Cytoplasm
      • Gel-like mixture
      • Surrounded by cell membrane
      • Contains all the organelles
      • In it, all the chemical reactions occur.
    • Ribosomes
      • Each cell contains thousands
      • Make proteins
      • Found on rough endoplasmic reticulum & floating throughout the cell
    • Endoplasmic reticulum
      • Moves materials around in cell:
      • Lipids and carbohydrates in smooth type
      • Proteins in rough type
    • Golgi apparatus
      • Protein 'packaging plant'
      • Move materials within the cell and out of the cell by using vesicles
    • RE and Golgi apparatus
    • Vacuole
      • Membrane-bound sacs for storage, digestion, and waste removal
      • Help plants maintain shape
    • Lysosome
      • Contains digestive enzymes for proteins, fats, and carbohydrates
      • Transports undigested material to cell membrane for removal
      • Cell breaks down if lysosome explodes
    • Mitochondrion
      • Produces energy through chemical reactions – breaking down fats & carbohydrate
    • Chloroplast
      • Contains green chlorophyll
      • Where photosynthesis takes place
    • Centrioles
      • Lead cromosomes movement during cell division
      • Control flagella and cilia vibration
    • Cytoskeleton
      • Support organelles and cell shape and place a role in cell motion
    • Flagellum and cillia Help cell move