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A & P Lab I (Woods)
Use of the Microscope
| Question | Answer |
|---|---|
| used for precise focusing | fine adjustment knob |
| lower support of microscope | base |
| narrows beam of light | condenser |
| hole in stage | aperture |
| used only at low power | coarse adjustment knob |
| has knobs to move slide | mechanical stage |
| special paper for cleaning | lens paper |
| eyepiece | ocular lens |
| holds ocular lens | body tubes |
| lens attached to nosepiece | objective lenses |
| supportive frame | arm |
| a small drop of immersion oil is used on the slide to eliminate the air between the lens and the slide to improve resolution | oil-immersion objective lens |
| a flat, horizontal shelf under the objective lenses that supports the microscope slide. | stage |
| a series of flat metal plates at the base of the condenser to regulate the amount of light passing through the condenser. | iris diaphragm |
| provides the light that passes through the specimen, through the lenses, and finally into your eyes. | lamp |
| controls the brightness of the light | light control knob |
| T/F Carry the microscope with two hands, one on the arm and the other supporting the base. | True |
| T/F Completely unwind the electrical cord before plugging it in, if there is a built in light source. | True |
| T/F To clean the lenses, use only the lens-cleaning fluid and lens paper provided. | True |
| T/F When you are finished using it, store the microscope with the lower power objective lens in position and the stage cabinet or cover it with a dust cover. | True |
| Which parts of a microscope are used to regulate the intensity and contrast of light? What is the function of these parts? | the condenser and the iris diaphragm condenser:narrows the beam of light iris diaphragm: is a series of flat metal plates at the base of the condenser to regulate the amount of light passing through the condenser. |
| How is magnification controlled in the microscope? | by the objective lens |
| Why should you always view a slide at lower power first? | Because it is easier to locate the specimen at this power. |
| Describe when to use the coarse adjustment knob and when to use the fine adjustment knob. | Use the course adjustment knob to bring the speciman into focus and then use the fine adjustment knob to focus on the detail of the specimen. |
Created by:
cardiolove11