do now take a note packet from the front. the history of the cell the cell the basic unit of an...
TRANSCRIPT
DO NOW
Take a Note Packet from the front
The History of the CellThe Cell
The basic unit of an organismDiscovery made possible by the invention of the microscope
http://www.youtube.com/watch?v=dscY_2QQbKU
Microscopes and Cells1600’s.
Anton van Leeuwenhoek first described living cells as seen through a simple microscope.
Microscopes and Cells1830’s.
Mathias Schleiden identified the first plant cells and concluded that all plants made of cells.
Thomas Schwann made the same conclusion about animal cells.
Cell TheoryAll organisms are made up of one or
more cells.The cell is the basic unit of
organization of all organisms.All cells come from other cells already
in existence.
Why do you think the cell theory important and how is
it used today?
Cells
There are 200 different kinds of cells in the human body!
Shape of cells is dependent on Function
Two basic cell types
Karyon= Nut or kernel
Pro= Before
Eu= true
Prokaryotic and Eukaryotic cells
Prokaryote Vs. Eukaryote
Prokaryote Eukaryote
# of Cells
Size
Organelles
DNA
Example
Two Basic Cell Types1) Prokaryote
Lacks internal compartments.
No true nucleus.Most are single-celled (unicellular) organisms.
Examples: bacteria
Two Basic Cell Types2) Eukaryote
Has several internal structures (organelles).
True nucleus.Either unicellular or multicellular. unicellular example: yeast multicellular examples: plants and animals
Do Now Distinguish between prokaryotic and eukaryotic cells. Give examples of each.
Parts of the Eukaryotic Cell
BOUNDARIES CELL MEMBRANE (Plasma membrane)
boundary between the cell and its external environment
Semi-permeable/selectively permeable
Made of 2 layers of lipid (phospholipid) with embedded proteins
Lets Draw the cell membrane!
Cell membrane is referred to as a fluid mosaic model
Video
The Parts of The Eukaryotic Cell1)Boundaries
A) Plasma Membrane -- Serves as a boundary between the
cell and its external environment.
-- Allows materials to pass in and out of the cell.
CELL WALL
Protects and maintains structure
Plant cell walls are made of cellulose
Bacteria, fungi, and some protozoa have cells walls- made of chitin and sometimes proteins
The Parts of The Eukaryotic CellB) Cell Wall
-- Surrounds the plasma membrane of the cells of plants, bacteria, and fungi.-- Plant cell walls contain cellulose while fungi cell walls contain chitin.