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CELLS. Structure and Function Cell = smallest unit of life. Two Major Cell Types . Prokaryotic Cell. Eukaryotic Cell (protist, animal). Eukaryotic Cell (plant). Differences Between Cell Types. Common Components and Cellular Organization. Plasma Membrane boundary surrounding the cell

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CELLS

Structure and Function

Cell = smallest unit of life




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Eukaryotic Cell

(protist, animal)




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Common Components and Cellular Organization

  • Plasma Membrane

    • boundary surrounding the cell

  • Genetic material: DNA

    • located in a membrane-bound nucleus for eukaryotic cells

  • Cytoplasm

    • Semi-fluid matrix containing enzymes and organelles(enzyme = biological catalyst)

  • Cytoskeleton

    • network of filaments and tubules in cytoplasm that maintains cell shape, allows movement


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Features of Prokaryotic Cells

All prokaryotic cells contain


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Features of Prokaryotic Cells

Other possible prokaryotic structures


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Features of Prokaryotic Cells

Other possible prokaryotic structures


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In bacterial cells

where is the genetic material located?

which one is used for movement?

which one provides structural support for the cell?

Cell Wall

Flagellum

Capsule

Plasmid

Nucleoid

Applying Your Knowledge





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SER

Functions of Eukaryotic Cell Features

RER



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Functions of Eukaryotic Cell Features


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Rough Endoplasmic Reticulum

Smooth Endoplasmic Reticulum

Vesicle

Golgi Apparatus

Lysosome

Vesicle

Vesicle

Plasma

Membrane

Endomembrane System





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Functions of Eukaryotic Cell Features





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Which organelle produces proteins that will be exported from the cell?

Which organelle contains digestive enzymes?

Which site acts as a protein packaging and distribution center?

Cilium

Rough ER

Golgi apparatus

Smooth ER

Lysosome

Applying Your Knowledge


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Thought Questions the cell?

  • What are similarities for

    a. eukaryotic and prokaryotic cells?

    b. animal and plant cells?

    2. What are differences between

    a. eukaryotic and prokaryotic cells?

    b. animal and plant cells?


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Analogy the cell?

If the cell were a factory

the ____________________ would be

(name a cell component)

a _____________________________.(name a part of a factory)


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Cellular Interactions the cell?

  • Signal Transduction: passing a signal from the cell surface to the interior

    • First messenger binds to Cell Surface Receptor

    • Receptor signals nearby Regulator Protein

    • Regulator activates nearby enzyme

    • Enzyme catalyzes formation of Second Messenger

    • Second Messenger initiates Cellular Response


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Cellular Interactions the cell?

  • Cell Adhesion: joining of cells controlled by proteins called Cellular Adhesion Molecules (CAMS)

    important in

    • Inflammatory Response

    • Placenta Formation

    • Learning and Memory

      Lack of cell adhesion is implicated in cancer and arthritis.


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