Chapter 7 . A View of the cell. Objectives Relate advances in microscope technology to discoveries about cells and cell structure. Compare the operation of a compound light microscope with that of an electron microscope Identify the main ideas of the cell theory. . The Discovery of cells.
Compound light microscope uses a series of lenses to magnify objects in steps.
Robert Hooke- (English Scientist) by using a compound light microscope, looked and observe dead bark and notice shapes in the bark.
Theodor Schwann- ( German Scientist) looked at animals and saw the same shapes as Hooke.
Therefore the cell theory was made.The cell theory
Electron microscope uses a beam of electrons instead of light to magnify structures up to 500,000 times their actual size.
This allowed scientist to see structures inside the cell.Electron microscope
Organelles are membrane- bound structures with particular functions within cells.
Prokaryotic cells- are cells that do not contain any membrane-bound organelles. Example- bacteria
Eukaryotic cells- cells that contain membrane- bound organelles. examples- yeast, us!The cell types
Robert Brown- observed in the eukaryotic cells contain a prominent structure.
Nucleus- central membrane bound organelle that manages or controls cellular functions.