Microscope Quiz

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31 Terms

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5

Where does light enter the system from?

Substage illuminator (lamp) or mirror

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6

What focuses the light?

A condensor

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7

Where is the specimen placed onto?

The stage

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8

Where is the iris diaphragm located?

Between the light source and condenser

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9

Which way do u move the diaphragm to increase intensity?

Right

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10

After light passes the specimen, where does it enter?

Objective lens system

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11

Where does the lens project the light upward into?

Body tube

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12

What magnifies the image to be seen by the eye?

The eyepiece (ocular)

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13

How do u calculate the total magnification?

Multiply the power of eyepiece by power of objective

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14

How do u clean the lenses?

Lens paper

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15

When do u use alcohol for?

Difficult cleaning

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16

What do you use as a last resort cleaning?

Xylene

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17

What is the circular area you can view?

Field of view

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18

What do we measure the field of view in?

Millimeters

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19

What does parfocal mean?

This means that when a specimen is in focus with a lower-power objective, it will be in focus (or nearly so) when a higher-power objective si rotated into Position

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20

The working distance is shorter when using what?

Higher magnifications

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21

Depth of view

Vertical depth of a specimen clearly in focus

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22

how do you prepare a wet mount?

1.) clean microscope with soap

2.) place tiny specimen and use medicine dropper to put a drop of water

3.) cover with coverslip

4.)remove excess water

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23

What is a stereo microscope?

Dissecting microscope used for observing details of large specimens

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24

What are the three major parts of a cell?

Nucleus

Cytoplasm

Plasma membrane

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25

What is the function of the cell membrane?

Regulates movement in and out of the cell and maintains integrity

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26

A membrane that regulates what goes in and out is what

Selectively permeable

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27

The cell membrane consists of a double layer of what

Phospholipid molecules

-includes polar heads, fatty acid tails, lipid tails

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28

What molecules can easily pass through phospholipid molecule?

O, H2O, CO

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29

What proteins are in the plasma membrane?

Globs, rods, fibers

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30

What is the function of carbohydrates?

Cell recognition, adhesion

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What is the function of cholesterol?

Stabilizes the membrane

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