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MicrobiologyLab11
Questions about "Smear Preparation and Simple Staining"
| Question | Answer |
|---|---|
| Bacterial cells are difficult to see because their index of refraction is very similar to ________. | water or air |
| A good spear should appear only slightly ________. | turbid |
| A slant culture is generally considered a better source of organisms for staining than is a ________ culture. | broth |
| An important consideration for the slide used for staining is that it be ________. | clean |
| True or false: Tap water can be used to make smears because there are too few bacteria (about 10,000 per ml) to see under oil immersion. | True. |
| A smear is best made if during the heating stage (mild/high) heat is used. | mild |
| True or false: Virtually everyone has bacteria in their saliva. | True. |
| The number of cells cited in the introduction (500,000 per ml) will result in about 1 cell per oil immersion field when observed under the microscope. If you had ten cells per field, you would have about ________ bacteria per ml of your saliva. | 5,000,000 |
| The large nucleated cells observed in saliva are most likely ________. | squamous |
| If cells stained with methylene blue are washed too long, the dye will be ________. | removed or washed away |
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NeuroHeart
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