chapter 7 cell structure and function m. c. alejandro cruz

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

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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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