Download The Cell Theory!

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

List of types of proteins wikipedia, lookup

Mitosis wikipedia, lookup

Cytokinesis wikipedia, lookup

Extracellular matrix wikipedia, lookup

Amitosis wikipedia, lookup

Organ-on-a-chip wikipedia, lookup

Endomembrane system wikipedia, lookup

Cell nucleus wikipedia, lookup

JADE1 wikipedia, lookup

Cellular differentiation wikipedia, lookup

Cell culture wikipedia, lookup

Cell growth wikipedia, lookup

Cell encapsulation wikipedia, lookup

Cell cycle wikipedia, lookup

Tissue engineering wikipedia, lookup

Signal transduction wikipedia, lookup

Cytosol wikipedia, lookup

Cell membrane wikipedia, lookup

Programmed cell death wikipedia, lookup

Transcript
The Cell Theory!
Leeuwenhoek
▫ Used a simple microscope
▫ First to see cells!
Robert Hooke
• Used a compound microscope
• Looked at cork- saw
• This reminded him of rooms in a monastery so
he called them “cells.”
T. Schwann
• Sounds like __________
▫ Swan!
• Concluded that all animals were made of cells.
M. Schleiden
• Concluded all plants were made of cells
Summary
*Hooke
Cells
*Schwann
Animals
*Schleiden
Plants
All those scientists contributed to:
• The Cell Theory
• What is a theory?
• A broad explanation that is testable, and has
been proved by multiple researchers.
• Components of it can be changed or improved
upon, without changing the overall truth of the
theory as a whole.
First Part of the Cell Theory
• All living things are made of
▫ cells
• They are either:
▫ Unicellular Consisting of only ONE cell
▫ Multicelluar Consisting of MANY cells.
Second Part of the Cell Theory
• A cell is the basic unit of life.
•
•
•
•
•
Cells
Tissue
Organ
Organ system 
Organism!
• The beginning unit is always what?
▫ A CELL!
Third Part of the Cell Theory
• All cells come from pre-existing cells.
Muscle
Skin
Muscle
Muscle
Muscle
Skin
Muscle
Muscle
Skin
Muscle
INTRO TO CELLS
• You will need a separate sheet of paper to take
additional notes.
• http://videos.howstuffworks.com/hsw/9699cells-and-genetics-cell-theory-video.htm
•
Intro to Cells!
• Cell organelles:
• “tiny organs”
Most important
•
nucleus!
Organelles we will be very familiar
with!
• Nucleus**
•
•
•
•
•
•
•
•
•
▫ Nucleolus
Endoplasmic Reticulum (rough and smooth)
Ribosomes**
Golgi Apparatus
Lysosomes
Plasma (cell) membrane**
Vesicles
Mitochondria**
Cytoplasm (cytosol)
Cytoskeleton
▫ Centrioles
• Vacuoles
• Chloroplasts**
• Cell Wall**
Two categories of cells:
•
•
•
•
•
•
Prokaryotes
No nucleus
Majority are unicellular
Simple- 1-2 organelles
1 job at a time
Bacteria (eu- and
archaea-)only
• Eukaryotes
• Nucleus
• Majority are multicellular
• Complex- 10-12 organelles
• Good at Multitasking
• Plants/animals/fungi/
protists
**THEY BOTH HAVE DNA AND RIBOSOMES!!!**
PROKARYTIC CELLS LACK
MEMBRANE BOUND ORGANELLES
Escherichia coli (E. coli)
Prokaryotic Cell
Eukaryotic Cells
Fungi
Animal
Plant
Protist
Semi (selectively) Permeable
• Semi▫ Some
• Selectively▫ choosey
• Permeable▫ allows to pass
• Selectively Permeable▫ chooses what it allows to pass through (Does this
by active and passive transport).
Cell Membrane
AKA “Plasma Membrane”
AKA
Thephospholipid
outer boundary of bilayer
a cell- skin
• Job:
▫ To maintain homeostasis
 To regulate what goes in and out of a cell
• What is homeostasis?
▫ Internal balance- keeping things happy
CARBOHYDRATE
PROTEIN MOLECULE
PROTEIN MOLECULE
PROTEIN MOLECULE
LIPID
BILAYER
A.
Water- loving (outside
of cell- touches water)
B.
Water- fearing (inside of
sandwich- never touches water)
POLAR
HEADS
NONPOLAR
TAILS
Fluid Mosaic Model*
• Fluid Flexible
• Mosaid different parts
• Model  representation
Function of:
• Proteins in the membrane:
▫ Transport molecules in and out of the cell.
• Lipids in the membrane:
▫ Creates a barrier between the cell and the watery
environment that is surrounding.
• Carbohydrates in the membrane:
▫ Chemical signals and cell communication
ALL CELLS…
• … HAVE DNA AS THEIR GENETIC
MATERIAL (nucleus=euk or nucleoid=prok)
• … HAVE A CELL MEMBRANE
• … HAVE RIBOSOMES
• … HAVE CYTOPLASM
• http://videos.howstuffworks.com/hsw/6051cells-cell-walls-and-cell-membranes-video.htm