Unit 1

• Microscope were invented in 


  1595 by Hans and Zacharias Janssen
• Compound Microscope


  Microscope that uses more then one lens
• Robert Hooke


  Gave the name cells
• Robert Hooke added 


  A third lens and light under the microscope
• Antoni Van Leeuwenhoek


  Made single lens microscope and was the first person to observe the movement of living single-celled organisms
• Coarse Adjustment


  brings image into near focus
• Fine Adjustment


  Brings image into fine focus
• Magnification


  How many times larger the image is compared to the original
• Scale

  a comparison between the size of a drawing and

  the actual size of the object
• Spontaneous generation


  the belief that living things can emerge from non-living matter
• Louis Pauster disproved spontaneous generation by


  Setting up two flasks one with an s shaped neck the other without giving both access to air and boiled both in order to kill pre existing bacteria, the flask with the s shaped neck did not grow any bacteria whereas the other did
• Robert Brown


  identified the nucleus of the cell as being

  responsible for controlling cell function
• Schleiden & Schwann


  proposed that all plant and animals are composed

  of cells and described cells as the basic unit of life for all organisms
• Rudolf Virchow


  theorized that all cells arise only from pre-existing cells
• hormones


  chemicals produced in one part of your

  body that act on a different part
• receptors on the surface of the

  cells allow

  attach to the cell and carry out

  their function