Download Life Is Cellular 7.1

 All
living things are made of cells.
 Cells are the basic unit of structure and
function in living things.
 New cells are produced from existing
cells.
 Anton
van Leeuwenhoek
 Dutch Businessman 1600’s
 Invented first powerful microscope (300X)
 Examined pond water
 Saw “little animals”
 Simple

Microscope-1 lens.
Ex. Magnifying lens
 Compound
Light Microscope- uses light and
many lenses to view small objects.

Ex. *Our Lab*
1.) Body Tube- tube of mirrors connecting
objective lens and eyepiece
2.) Revolving Nosepiece- moves lens into place
3.) Low Power Objective- 4x or 10x; locates
specimen
4.) Medium Power Objective- 10x; locates
specimen
5.) High Power Objective- 40x; greater
magnification
 6.)
Stage Clips- holds slides in place
 7.) Diaphragm- controls the amount of light
 8.) Illuminator/Light 9.) Eyepiece (Ocular Lens)- piece you look
through, magnifies 10 times (10x)
 10.) Arm- supports body tube
 11.)

Stage- holds the slide
Stage Opening- circle where light passes through
 12.)
Coarse Adjustment- used for FIRST
focusing, moves body tube
 13.) Fine Adjustment- sharpens image, final
focusing
 14.) Base- bottom
 Slide-
holds the specimen (glass or plastic)
 Slide Cover- covers specimen so it doesn’t
move
 Lens Paper- cleans lenses
 One
hand on arm, one hand on base, electric
cord securely wrapped and looking forward.

Ocular Lens X Objective Lens =Total Magnification
 10X
 10X
 10X
X
X
X
4X
10X
40X
=
=
=
40X
100X
400X
 Put
slide under stage clips.
 Focus using low power (4X). Coarse -> Fine
 Switch to higher power (10X or 40X).
 *ONLY USE FINE ADJUSTMENT ON 40X LENS!
 Robert
Hooke- English Physicist
 observed plant cells
 named the word “cell” (Jail cells)
 Cell
Membrane- ALL cells are surrounded by a
thin flexible barrier.
 Nucleus-
Large membrane enclosed structure
that contains genetic material in the form of
DNA and controls many of the cells
activities.
 Enclose
DNA in their nuclei
 Cells
that do not enclose DNA in their nuclei
Prokaryotic
Eukaryotic
Simple
Complex
Unicellular
Mostly Multicellular
No Nucleus
Nucleus
No Organelles
Organelles
First Cells on Earth
Ex. Bacteria
Ex. Plant & Animal Cells
Plant Cell
Animal Cell
Eukaryotic
Eukaryotic
Cell Wall
Cell Membrane
Photosynthesis/Chlorophyll
Obtain Energy/ Eat
Boxlike Shape
Various Shapes