Bio 2 - Unit 2: Cell Structure and Function Instructor:...

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Unit 2:  Cell Structure and  Function Instructor: Cheryl Dunham Office: 102 LeFevre Hall Box: 114 LeFevre Hall
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KNOW YOUR  VOCABULARY
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Microscopy Magnification Scanning lens  = 4x objective Low power lens  = 10x objective High power lens  = 40x objective Ocular  (eyepiece) –  also has a magnification  (usually  between 5x and 10x) http://www.global-b2b- network.com/direct/dbimage/50215890/Microscope.jpg
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Microscopy Total magnification =     (power of ocular) * (the power of the objective lens) Ocular power of 5x Objective lens of 40x Total magnification = ? 5 * 40 =  200x http://pinewood.es.brevard.k12.fl.us/teachers/media/Kris' %20Discovery%20Clips/Magnifying%20Glass2.gif
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Microscopy Field of view  – the  image you see  through the ocular Depth of field  – how “deep” you can see the object the third dimension of the 3-D object that you are viewing the  thickness of the plane of focus Focal plane  –  level of what you can see clearly the plane which is in focus S X A H Z L O T G S A H L
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Microscopy Effects of changing  from a lower power  objective to a higher  power objective Field of view –  decreases  Depth of field –  decreases  Intensity of light –  decreases  How to adjust aspects  of the microscope Field of view  – can  move objects in and out  by  shifting the slide on  the mechanical stage Focal plane  – can  adjust by moving  the  fine adjustment knob Light intensity  – sliding  the  lever of the  diaphragm
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Microscopy Focal plane – turning the  fine adjustment Aspect of Microscope Increases Decreases Field of View moving to  a lower  power objective  lens moving to a  higher power  objective  lens Depth of Field moving to a  lower  power objective  lens moving to a  higher power  objective  lens Light intensity moving to a  lower  power objective  lens moving to a  higher power  objective  lens
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Cell Structure The  cell membrane fluid-mosaic model made up of  phospholipids and proteins some proteins can go all the way through the phospholipid   bilayer some proteins  can make channels through the bilayer heat and some liquids  (other than water)  can disrupt the  membrane http://content.cdlib.org/xtf/data/13030/n2/ft796nb4n2/figures/ft796nb4 n2_00012.jpg http://www.mosaicfrance.com/images/index/mosaic
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Cell Structures Structure Function Golgi bodies Package/assemblage  and  transport  
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This note was uploaded on 04/08/2008 for the course BIO 1020 taught by Professor Dunham during the Spring '08 term at Missouri (Mizzou).

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Bio 2 - Unit 2: Cell Structure and Function Instructor:...

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