BIO120H1 Chapter Notes - Chapter 6: Tight Junction, Macrophage, Vacuole
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BIO120H1 Full Course Notes
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Concept 6. 1: biologists use microscopes and the tools of biochemistry to study cells: though usually too small to be seen by the unaided eye, cells can be complex. Microscopy: scientists use microscopes to visualize cells too small to see with the naked eye. In a light microscope (lm), visible light is passed through a specimen and then through glass lenses: lenses refract (bend) the light, so that the image is magnified, three important parameters of microscopy. Magnification, the ratio of an object"s image size to its real size. Resolution, the measure of the clarity of the image, or the minimum distance of two distinguishable points. Confocal microscopy and deconvolution microscopy provide sharper images of three- dimensional tissues and cells. New techniques for labeling cells improve resolution. Comparing prokaryotic and eukaryotic cells: basic features of all cells. Ribosomes (make proteins: prokaryotic cells are characterized by having. Dna in an unbound region called the nucleoid.
