Lab Practical #1

Front 1

oculars

Back 1

located on the top of a microscope holding the lens, one may include a pointer and/or ruler

Front 2

arm

Back 2

aids in transporting the instrument

Front 3

revolving nosepiece

Back 3

rotational device allowing the attachment of the objective lens

Front 4

objective lens

Back 4

4 different lenses that magnify objects at different magnification

Front 5

stage

Back 5

horizontal platform used to hold slides

Front 6

mechanical stage (with knobs and clips)

Back 6

secures the slide and allows movement of slide

Front 7

condenser

Back 7

just underneath the mechanical stage

-focuses light on the object

Front 8

iris diaphragm

Back 8

lever projecting off the condenser

-controls the level of light passing through the object

Front 9

fine adjustment knob

Back 9

small knob located near the base

-brings the specimen into sharper focus

Front 10

coarse adjustment knob

Back 10

large knob projecting from the arm near the base

-lowers and raises the mechanical stage, allowing objects to come in contact with the objective lens

Front 11

light source

Back 11

where the light shines through to the specimen

Front 12

on/off switch

Back 12

controls the power source of the instrument

Front 13

rheostat

Back 13

controls the light source and the amount of light illuminating the specimen

Front 14

scanning objective lens

Back 14

red stripe with the "4x"

-used to scan the slide to locate specific objects

Front 15

low power objective lens

Back 15

yellow stripe with the "10x"

-used for closer observation

Front 16

high power objective lens

Back 16

blue stripe with the "40x"

-used for showing more details

Front 17

oil immersion objective lens

Back 17

white stripe with the "100x"

-only used with immersion oil

-used to show the closest detail

Front 18

hierarchy of life?

(atoms-->organism-->biosphere)

Back 18

1. atoms

2. molecules

3. organelles

4. cells

5. tissues

6. organs

7. organ systems

8. organisms

9. population

10. communities

11. ecosystems

12. biospheres

Front 19

ubiquitous

Back 19

present everywhere

Front 20

nucleolus

Back 20

area of ribosome formation

Front 21

ER

Back 21

synthesize proteins and other products

-forms transport vesicles

Front 22

golgi body

Back 22

packages materials to be moved out

Front 23

lysosome

Back 23

digestion of damaged organelles, bacteria, other materials

Front 24

mitochondria

Back 24

chemicale energy in food --> cellular energy

Front 25

chloroplast

Back 25

converts light enegy --> chemical energy

Front 26

central vacuole

Back 26

only in plants

-water absorbtion and stroage of chemicals or waste products

Front 27

nuclear envelope

Back 27

controls passage of materials in and out

Front 28

centrioles

Back 28

spindle fibers during replication

-only in animals