Lab 5 Pearson

If your ocular lens is 10×, and you are using your 45× objective lens to view a slide, the total magnification is ________.

10x * 45x = 450x

If a circular object seen in your low-power field (diameter 1 mm) occupies about 1/4 of the diameter of the field, the object's diameter is about ________.

250 μm μm is .001x mm

You are looking at very lightly stained cells under the microscope, and you want to increase the contrast so that you can see them "better." You ________ the iris diaphragm to ________ the light.

close, dim

The ________ is a substage lens that concentrates light on the specimen.

condenser

As total magnification increases, the depth of field ________.

decreases

As you increase the total magnification of the specimen, the size of the field ________.

decreases

As you increase the total magnification of the specimen, the working distance ________.

decreases

You should always begin observation of specimens with the oil immersion lens.

false

When using the higher power objective lenses, you would use this part of the microscope to focus the specimen.

fine adjustment knob

When observing a slide under a microscope, begin focusing with the ________-power objective lens in place.

lowest

You begin your observations using the ________ lens and the ________ adjustment knob.

lowest-power, coarse

The total magnification of an object can be found by ________.

multiplying the power of the objective lens by the power of the ocular lens

The ________ of the microscope carries three or four objective lenses.

nosepiece

You prepare a wet mount of your own cheek cells and place it under the microscope, but find that you cannot see any detail of the cells. What can you do to make details more visible?

prepare another slide and stain with methylene blue

before putting away the microscope in the storage cabinet, you must observe all of the following except?

rotate the highest power objective lens in position

Microscope specimens have depth, as well as length and width. If you are focused on the middle layer of cells and wish to see the top layer of cells clearly, you should move the ________.

slide further away from the lens

The microscope slide rests on the __________ while being viewed.

stage

When you want to study a slide under the microscope, you place it on the ________.

stage

Your lab microscope is parfocal. This means that __________.

the slide should be almost in focus when changing to higher magnifications

to transport a microscope how do you hold it?

up right, with one hand on its arm and the other hand supporting it's base

How do you clean the lenses of your microscope?

with special lens paper and cleaner

You are observing the letter "e" under a compound microscope. Which of the following indicates how the image appears as you view it through the ocular lens?

ə