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What is the dfference between a dissecting microscope and a compound microscope?
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Dissecting microscope used to observe large, opaque odjects and there are three objective lenses to change to higher magnification. a compound mircroscope generally transmitting light is used to observe fine details in small specimes with three different magnifications. (4x, 10x, 40x)
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What does a condenser do in a compound microscope?what is the objective on teh microscope?
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It focuses the light on the specimen and into the objective the objectives together with teh ocular provide teh final agnified image
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What should you remember when drawing
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Unlined paper, light pencil, drawing should fill (2/3) of the page, keep drawing slightly to the left, dot do not shade, drawing needs a figure number abd a full descriptive title, label drawing fully, include a scalte bar with calculation on the back of the page.
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How should you write a figure titile?
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Figure number, genus and species name, type of section (l.s w.m. c.s), part of the organism if applicable (stem, leaf, etc)
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What do l.s w.m. and c.s. stand for?
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L.s. longitudenal section
w.m. whole mount c.s. cross section |
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What is the diamter of the field veiw of the 4x, 10x, and 40x objective lense?
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4x is 5mm
10x 2.0mm 40x 0.125mm |
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How do you calcualte a scale bar for an object with an estimated length of 0.8mm and when the size of your drawing is 120mm?
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120mm(drawn = xmm (lenght of scale bar)
0.8mm(actual 0.1 mm (scale bar size represented) x = (120mm x 0.1mm) = 15mm 0.8mm |
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Dangers of methylene blue and toluidine blue
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methylene: harmful if swallowed, stains, skin irratent
toluidine: harmful of swallowed, inhaled or absorbed, irratate skin |
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How do you prepare a slide?
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When making hand cut specimens use a rasor and drawit across the specimen, float in water and transfer to slide with water drops on it. use appropriate stain. water prevents large bubbles then add coverslip.
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What are the four major classes of organic milecules that form the basis of living organisms
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Lipids, carbohydrates, proteins, and nucleic acid
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What is different about carbohydrates and proteins from lipids and nucleic acid?
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Carbohydrates nad proteins are large molecules they are polymers and consist of smaller sudunits of small molecules (monomers)
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What is a condensation reaction and a hyrolysis reaction?
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Condensation reaction is when monomers bond to form a polymer and their is a loss of one water molecule. a hydrolysis is the opposite when the reaction uses water to break down a polymer into monomers .
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What is another term for glucose, maltose or a carbohydrate
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Monosaccharide, disaccharide or polysaccharide
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What are the two main storage macromolecules?
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Startch in plants adn glysogen in animals
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What is a lipid? what is another word for fat? what is a phosphlipid?
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A large class of macromolecules. Another word for fat is a triglyceride and phospholipds are the main compnent of cell membranes.
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