Download Cell Unit Test Review

Cell Unit Test Review
Types of Microscopes
• Simple – one lens
• Compound – 2 or more lenses
• Stereoscopic – 3D and is used for
dissections
• Electron – 20x – 30,000x magnification
Coarse adjustment knob
Diaphragm
Base
Arm
Light source
Eyepiece
Objective Lens
Stage
Fine Adjustment Knob
Stage Clips
Nosepiece
Scientists and Their Contributions
• Hooke – named cells from a piece of cork
(dead plant)
• Leeuwenhoek – invented the first
microscope and discovered bacteria
• Schleiden – said plants are made of cells
• Schwann – said animals are made of cells
• Louis Pasteur – pasteurization
---first to show that living things come only from
living things. His discovery that bacteria spread
diseases saved countless lives.
The Cell Theory
1. All living things are made of cells.
2. Cells are the basic units of structure
and function in living things. (structure
= form; function = purpose)
3. Living cells only come from other living
cells.
What are cells?
Organism
 An organism is made
of organ systems.
 Organ systems are
made up of organs
 Organs are made up of
tissues
 Tissues are made up
of CELLS!
Organ System
Organ
Tissue
Cells!!!!
Can you remember the function of each?
Cell membrane – allows only certain
things into the cell
Cell wall – only plants – gives support
Nuclear membrane – protects the
nucleus
Vacuole – stores waste– super huge in
plant cells
Nucleus – controls the cell – contains
DNA
Animal Cell
Plant Cell
THE DIFFERENCE BETWEEN
ANIMAL & PLANT CELLS
Vocabulary you should know
• Prokaryotic cell
Prokaryotes are single-celled organisms that are the
earliest and most primitive forms of life on earth.
• Bacteria
Bacteria consist of only a single cell
• Virus
A virus is a small infectious agent that can
only replicate inside the cells of another
organism.