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30 Cards in this Set

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Robert Hook (1665)
Discovered and named cells whtn looking under a microscope
Anton van Leeuwenhoek
observed tiny living organisms in pond water
Matthais Schleiden (1838)
all plants are made of cells
Theodor Schawnn (1839)
all animals are made of cells
Rudolf Virchow (1855)
new cells are produced by the division of existing cells
Cell Theory
All living things are composed of cells
Cells are the basic units of structure and function of all living things.
New cells are produced from existing cells
Light microscope
produce magnified images by focusing visible light rays

most common magnify about 1000 times
Electron microscope
produce magnified images by focusing beams of electrons

can focus on very small objects magnification: 2000 times
prokaryotes
simple cell, NO NEUCLEUS

ex. bacteria
Unicellular
single celled
Multicellular
many cells
Eukaryotes
more complex, HAVE NEUCLEUS
levels of organization
Cells---Tissues---Organs---Organ systems---Organism
Tissues
Group of cells that do the same thing
Organs
group of tissues working togther
organ systems
a group of organs working together to perform a function
Cell wall
found: plant
function(s): provide support and protection for the cell
Cell membrane
found: both
function(s): controls all that enters and leaves the cell. In multicellular organisms allows self recognition
Neucleus
found:both
function(s):controls ALL cell activity. Manufactures ribosomes. Stores info needed for the manufacture of proteins.
CONTORL CENTER
Cytoplasm
found:both
funciton(s):holds organelles in place
Nucleolus
found:both
function(s):assembly of ribosomes made
endoplasmic reticulum (ER)
found:both
function(s):transports materials
Smooth ER
make lipids including the cell membrane
Rough ER
proteins are produced
Ribosome
found:both
function(s):what proteins are assembled on. produce proteins by following coded instructions from the nucleus. site protein synthesis
Golgi apparatus
found:both
function(s):pacakages proteins and other materials from ER for storage in cell
Vesicle
found:both
function(s):holds and transports materials
Vacuole
found:both
function(s):store materials

ex. water, salts, proteins, carbs
Lysosome
found:animal (very rare in plant)
function:digestion of lipids, carbs, and proteins into sm. molecules. can be used by rest of cell. breaking down organelles have out lived their usefulness.
Cytoskeleton
found:both
function(s):helps support cell, maintain its shape