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The scanning, low, and high power objectives are mounted on the:
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5. Cell Components
Microscopes
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Which part of a compound light microscope is primarily responsible for focusing the image by moving the stage up and down?
A
Coarse adjustment knob
B
Eyepiece (ocular lens)
C
Diaphragm
D
Objective lens
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Understand the function of each part of the compound light microscope mentioned in the problem: The coarse adjustment knob, eyepiece (ocular lens), diaphragm, and objective lens.
Recall that the coarse adjustment knob is specifically designed to move the stage up and down to bring the specimen into focus. This is typically used for initial focusing at lower magnifications.
The eyepiece (ocular lens) is the part you look through to observe the magnified image. It does not move the stage or focus the image directly.
The diaphragm controls the amount of light that passes through the specimen, but it does not contribute to focusing the image.
The objective lens is responsible for magnifying the image of the specimen, but it does not move the stage or focus the image directly. Therefore, the coarse adjustment knob is the correct answer.
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