chapter 7 cell structure and function m. c. alejandro cruz
TRANSCRIPT
Chapter 7CELL STRUCTURE AND FUNCTION
M. C. Alejandro Cruz
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
The discovery of the cell
The invention of the microscope
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
1600 1665 1674 1838 1839
Englishman Robert Hooke used an early compound microscope to look at a thin slice of cork
Anton van Leewenhoek used a single lens microscope to observe pond water and other things
Matthias Schleiden concludesThat all plants are made up of cells
Theodor Schwann concludes that all animals are made up of cells
Scientists begin to use microscopes
1855
Rudolph VirchowNew cells could be produced from the division of existing cells
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CIDEBCELL STRUCTURE AND FUNCTION
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
Cell theory: All living things are
composed of cells Cells are the basic units
of structure and function in living things
New cells are produced from existing cells
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
The study of structure and movement of living cells:
Fluorescent labels Light microscopy Confocal light microscopy High resolution video
technology
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
TEM: Transmission electron
microscope Explore cell structure
and proteins Beams of electrons
pass through thin samples
Sample must be cut ultrathin
SEM: Scanning electron
microscope Beams of electrons
scan the surface Produces three
dimensional images
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CIDEB
7-1 Life is Cellular7-1 Life is Cellular
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CIDEB
7-1 Life is Cellular7-1 Life is Cellular
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CIDEB
7-1 Life is Cellular7-1 Life is Cellular
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
Cell range 5-50 micrometers
Two characteristics: Surrounded by a barrier
(CM) Contain DNA
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is Cellular
Prokaryotes Eukaryotes
Do not contain nulcei
Contain nuclei
Means “before”
Means “true”
Smaller and simpler
Larger and more
complex
bacteria
Plants, animals,
fungi, protists
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CIDEBCELL STRUCTURE AND FUNCTION
7-1 Life is CellularProkaryotes
Eukaryotes
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CIDEBCELL STRUCTURE AND FUNCTION
CHAPTER 7
7-1 THE END
Mr. Cruz