BI-201 Lab 5 Microscope and Cell Structure 2023

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30 Terms

1

Microscope

A precision instrument used to magnify objects for examination.

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2

Total magnification

The combined magnification factor of the ocular lens and the objective lens.

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3

Paracentric

A property of a microscope where objects remain centered in the field of view when switching objectives.

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4

Parfocal

A property of a microscope that allows objectives to be changed with only minor focusing adjustments needed.

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5

Field of view

The circle of light visible through the microscope.

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6

Depth of focus

The ability to see through the thickness of a specimen at different focal planes.

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7

Working distance

The space between the objective lens and the slide.

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8

Wet mount

A temporary preparation technique where specimens are mounted in a drop of water and covered with a cover slip.

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9

Eukaryotic cells

Complex cells that contain a nucleus and membrane-bound organelles.

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10

Prokaryotic cells

Simpler cells that lack a nucleus and complex membrane-bound organelles.

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11

Chloroplasts

Organelles in plant cells that carry out photosynthesis.

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12

Cytoplasmic streaming

The circular flow of cytoplasm that helps distribute materials within a cell.

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13

Pseudopodia

Temporary projections of eukaryotic cells used for movement and feeding.

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14

Cover slip

A thin piece of glass used to cover specimens on a microscope slide.

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15

Iris diaphragm

A component beneath the condenser that regulates the amount of light passing through the specimen.

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16

Coarse adjustment knob

A knob used for preliminary focusing by moving the stage up or down.

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17

Fine adjustment knob

A knob used for making precise adjustments to the focus.

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18

Mechanical stage knobs

Knobs that control the movement of the slide on the stage.

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19

Rheostat

A knob that adjusts the voltage and light intensity of the microscope.

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20

Condenser

A lens system under the stage that focuses light onto the specimen.

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21

Stage

The platform where the slide is placed for examination.

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22

Objective lens

The lens closest to the specimen that provides magnification.

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23

Ocular lens

The lens through which the viewer looks, typically providing 10x magnification.

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24

Condenser lens

A lens that focuses light onto the specimen to enhance illumination.

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25

Base

The bottom support structure of the microscope.

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26

Arm

The structure that connects the base to the head of the microscope, providing support.

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27

Illuminator

A light source used to illuminate the specimen being viewed.

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28

Mechanical stage

A platform that allows for precise movement of the slide during viewing.

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29

Light source

The bulb or LED that provides light for viewing the specimen.

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30

Revolving nosepiece

The rotating part of the microscope that holds multiple objective lenses.

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