NAS2 CELLS

  1. Mid 1600s - Robert Hooke
    –observed and described cork–first to use the term “cell”
  2. Late 1600s -
    Antony van Leeuwenhoek –observed sperm, microorganisms–“Father of Microbiology”
  3. 1820s - Robert Brown –
    observed and named nucleus
  4. Matthias Schleiden –
    All plants are made of cells
  5. Theodor Schwann –
    All animals are made of cells
  6. Rudolf Virchow–
    Cells only come from other cells
  7. The cell theory
    • 1) All organisms are composed of cells
    • 2) Cell is smallest unit having properties of life
    • 3) Cells come only from other cells
  8. tell me 5 different thing about the cell
    • Smallest unit of life.
    • Has potential to survive on its own.
    • Is highly organized.
    • Senses and responds to environment.
    • Has potential to reproduce
  9. what are the Structure of Cells
    • All cells contain:
    • –Plasma membrane
    • –Cytoplasm
    • –DNA (often in nucleus)
    • Two major types of cells:–Prokaryotic–Eukaryotic
  10. what do microscopes help us do
    • Allow us to see something that is otherwise too small to see
    • Light microscopes
    • –Simple or compound
    • Electron microscopes
    • –Transmission EM or Scanning EM
  11. Limitations of Light Microscopy
    • Wavelengths of light are 400-750 nm.
    • If a structure is less than one-half of a wavelength long, it will not be visible.
    • Light microscopes can resolve objects down to about 200 nm in size.
  12. Electron Microscopy
    • Uses streams of accelerated electrons rather than light.
    • Electrons are focused by magnets rather than glass lenses.
    • Can resolve structures down to 0.5 nm.
  13. what are 4 things about Prokaryotic Cells
    • Archaebacteria and Eubacteria
    • DNA is circular and not enclosed in nucleus
    • Smallest, simplest cells
    • Lack organelles
  14. the 4 things to know about Eukaryotic Cells
    • Eukaryotic organisms
    • 1.Plants
    • 2.Animals
    • 3.Protistans
    • 4.Fungi
    • -Highly organized
    • -DNA in the nucleus
    • -Many organelles
  15. 7 Animal Cell Features
    • Plasma membrane
    • Nucleus
    • Ribosomes
    • Endoplasmic
    • reticulumGolgi
    • bodyVesicles
    • Mitochondria
    • Cytoskeleton
  16. Image Upload 1
  17. Functions of Nucleus
    • Separates the DNA from cytoplasm
    • DNA can be copied before cells divide
  18. Function of Cytomembrane System
    • Organelles which
    • 1.assemble lipids
    • 2.modify proteins
    • Products are sorted and shipped
  19. componets of Cytomembrane System
    • Endoplasmic reticulum (ER)
    • Golgi bodies
    • Vesicles
  20. Endoplasmic Reticulum
    • In animal cells, continuous with nuclear membrane
    • Extends throughout cytoplasm
    • Two regions: rough ER and smooth ER
  21. Golgi Body
    • Modifies proteins and lipids from ER.
    • Packages material for shipment.
    • Material arrives and leaves in vesicles
  22. Mitochondria
    • Powerhouses of the cell
    • 1. Site of cellular respiration
    • 2. Produce ATP
    • Membranes form two distinct compartments ATP-making machinery embedded in inner mitochondrial membrane
  23. Plant Cell Features
    • Plasma membrane              Nucleus
    • Ribosomes                      Cytoskeleton
    • Endoplasmic reticulum    Golgi body
    • Vesicles                         Cell wall 
    • Mitochondria          Central vacuole Chloroplast
  24. Specialized Plant Organelles
    • Plastids
    • Chloroplasts
    • Central Vacuole
  25. Chloroplasts
    • Site of photosynthesis 
    • Convert sunlight energy to ATP
  26. Why Are Cells So Small?
    • Surface-to-volume ratio
    • The bigger a cell is, the less surface area there is per unit
    • volume Above a certain size, material cannot be moved in or out of cell fast enough
  27. Image Upload 2
Author
Emilyliz88
ID
318487
Card Set
NAS2 CELLS
Description
STUDY NOTES
Updated