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					CHAPTER 7 NOTES   A Tour of the Cell
               WHY STUDY CELLS?

To understand the functions of life!
History
  §Robert Hooke
  §Anton van Leeuwenhoek
  §Schleiden and Schwann
The Cell Theory
            HOW WE STUDY CELLS

Light Microscope
Transmission Electron Microscope (TEM)
Scanning Electron Microscope (SEM)
               TYPES OF CELLS

Prokaryotic
 §Lack nucleus
 §Lack membrane-bound organelles
 §Simple
Eukaryotic
 §Have nucleus
 §Have membrane-bound organelles
 §Bigger and more complex
               LIMITS TO CELL SIZE

Lower
 §DNA
 §Enzymes
Upper
 §Cellular transport
                     NUCLEUS

Function
 §Control
Structure
 §Nuclear envelope
 §Nuclear lamina
 §Chromatin
 §Nucleolus



                http://micro.magnet.fsu.edu/cells/nucleus/nucleus.html
                      RIBOSOMES

Function
 §Protein synthesis
Structure
Types
 §Free
 §Bound
             ENDOPLASMIC RETICULUM

Structure
Types
 §Smooth
 §Rough




              http://micro.magnet.fsu.edu/cells/endoplasmicreticulum/endop
              lasmicreticulum.html
                  GOLGI APPARATUS

Function
 §“Post Office”
Structure
 §Cisternae
   § Cis
   § Trans




                      http://www.britannica.com/EBchecked/media/114953/The-Golgi-apparatus-or-complex-
                      plays-an-important-role-in
                  LYSOSOMES

Function
 §Macromolecule digestion
Acidic environment
Other modes of digestion
 §Phagocytosis
 §Autophagy
                VACUOLES

Function
 §Storage
Types
 §Food
 §Contractile
 §Central
                  MITOCHONDRIA

Function
 §Cellular respiration
 §The powerhouse
Structure
 §Outer membrane
 §Inner membrane
   § Cristae
   § Mitochondrial matrix


                            http://www.cartage.org.lb/en/themes/sciences/zoology/animalphysiology/anatom
                            y/animalcellstructure/Mitochondria/Mitochondria.htm
                CHLOROPLASTS

Function
 §Photosynthesis
 §Plants and algae only
Structure
 §Chlorophyll
 §Thylakoids
   § Grana
 §Stroma


                          http://wdict.net/word/Chloroplast/lang/gv/lid/1_6355/
                PEROXISOMES

Functions
 §Produces H2O2
 §Fatty acid breakdown
 §Detoxify
                 CYTOSKELETON

Functions
  §Mechanical support
  §Maintain shape
  §Motility
3 Fibers of the Cytoskeleton
  §Microtubules
  §Microfilaments
  §Intermediate filaments
                   CELL WALL

Functions
 §Protection in plant cells
 §Maintains shape
 §Prevents excessive water uptake

				
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posted:7/17/2013
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