Cell Structure and Function

Cell Structure and Function - Cell Structure and Function...

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Cell Structure and Function Discovery of Cells Development of light microscope Janssens Robert Hooke (~1665) Van Leeuwenhoek (~1668) Schleiden (~1838)- plants Schwann (~1838)- animals Virchow (~1855)- cell theory Cell Theory p.89 Resolution Ability to distinguish fine detail Ability to distinguish structures that are very close together Eye= 0.2mm Light microscope= 0.2µm Transmission Electron Microscope (TEM)= 0.2nm Surface Area to Volume Ratio Surface Area= height x width x # of sides Volume= height x width x length As cells increase in size, cell surface area:volume ratio decreases Major Cell Types Prokaryotic Ancient/ancestral cell type Very little internal organization Lack an organized nucleus Eukaryotic Derived cell type More internal complexity Nucleus surrounded by nuclear membrane Prokaryotic v. Eukaryotic Size: Prokaryotic is smaller Internal compartment: Prokaryotic lack visible Unicellular v. Multicellular Membranes (phospholipid bilayer)
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Cell Structure and Function - Cell Structure and Function...

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