Cell Bio Unit 1 topic 1-B

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  1. Robert Hooke
    Scientist who used a simple microscope to examine a peice of cork and named the chambers "cells" even though they were cell walls left by the dead plants
  2. Matthias Schleiden
    Scientist who published paper that led to the birth of cellular biology in 1838 saying that plant and tissues were made of cells and that they came from pre-existing cells.
  3. Theodor Schwann
    Scientist who published paper that led to the birth of cellular biology in 1839 saying that and animal tissues were made of cells and that they came from pre-existing cells.
  4. Louis Pasteur
    1860s scientist that disproved spontaneous generation through experiments. Showed that life came from pre-existing life through the bent bottle neck experiment
  5. Charles Darwin
    Founder of the Theory of Evolution stateing that random variation and natural selection can drive the production fo organisms with novel features, adapted to new ways of life.
  6. Theory of Evolution
    Explains how diversity has arisen amoung organims that share a common anscetry.
  7. extracellular matrix
    a dense material often made of protein fibers embedded in a polysaccharide gel
  8. light microscopes
    can begin to distinguish and classify specific components in the cytoplams. structures smaller than .2 micrometers (about half the wavelength of light) can't be seen
  9. electron microscope
    Can't look at living specimens. Can see down to a few nm. Lots of preperation. Separates mess into organells (5nm) Some large molecules
  10. transmission electron microscope
    type of electron microscope that transmits a beam of electrons through the thinly scliced sample. (2nm)
  11. Scanning electron microscope
    Type of electron microscope that scatters electrons off the surface of the sample and so it is used to look at the surface details of cells and other structures (between 3 and 20 nm)
  12. confocal microscope
    Uses florencent light to see 3D images
  13. Eucaryotes
    organisms whose cells have a nucleus
  14. Procaryotes
    organisms whose cells don't have a nucleus
  15. Characteristics of Procaryotes
    Sherical, rodlike, or corkscrew in shape/ a few micrometers long/ tough protective coat(cell wall), surrounding the plasma membrane, which enloses the compartment containing the cytoplasm and DNA.
  16. mitochondria / bacteria
    organelle that generates engery in cell are thought to be evolved from aerobic(oxygen) bateria that took to living inside the anaearobic(no oxygen) ancestors of today's eucaryotic cells
  17. choroplasts
    organelle in plant cells that perform the photosynthesis are thought to be evolved from photosythetic bacteria that found homes inside the plant cell's cytoplasm
  18. 2 domains of procaryotes
    archaea and bacteria
  19. Domain Bacteria or Eubacteria
    • the domain that most of the everyday bacteria are in
    • cell walls, ell membrane, DNA w/o introns, ribosomes
  20. Domain Archaea
    • bacteria that in hostile enviroments like hot acid volcanic springs, and airless depths of mearine sediments
    • Cell walls and membranes, DNA w/ introns, ribosomes
    • Abundant in all habitats
    • more closely related to eukaryotes than to bacteria
  21. Progressive
    moving in a forward direction and asking questions based on what we learn
  22. Iterative
    looking back on what we know and asking new questions to further science. As we learn we know enough to ask new questions
  23. 1660's cell discoveries
    • Robert Hooke Discovered Cells
    • 1670's Leeuwenhoek discovered freee living cells in pond water
  24. 1800's Cell Discoveries
    • 1831 Robert Brown discovered the nucleus
    • 1858 Ruldof Virchow aregued there is no spontaneous generation
    • 1862 Louis Pasteur experimentally proved no spontaneous generation
  25. Who was the first person to describe bateria
  26. Spontaneous Generation
    claims that life can originate from non-living matter
  27. Biogenesis
    States that living cells come from pre-existing cells
  28. Advantages to the small size of bacteria
    • increased surface to volume ratio
    • increased transport of materails
    • faster growth rate
    • faster reporduction
  29. Prokaryote cell anatomy
    • Cell membrane
    • Cell wall has 2 arangements
    • cell membrane w/ single cell wall - Gram Positive
    • cell membrane w/ small of large or small cell wall and then a second wall called Gram Negative
  30. What type of Prok. cell anatomy can our immune system detect?
    Gram Positive
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Cell Bio Unit 1 topic 1-B
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