CELLS

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CELLS
Structure and Function Cell smallest unit of
life
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Two Major Cell Types
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Prokaryotic Cell
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Eukaryotic Cell (protist, animal)
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Eukaryotic Cell (plant)
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Differences Between Cell Types
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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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Applying Your Knowledge

• Cell Wall
• Flagellum
• Capsule
• Plasmid
• Nucleoid

• In bacterial cells
• where is the genetic material located?
• which one is used for movement?
• which one provides structural support for the
  cell?

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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
SER
RER
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Endomembrane System
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Functions of Eukaryotic Cell Features
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Applying Your Knowledge

• Cilium
• Rough ER
• Golgi apparatus
• Smooth ER
• Lysosome

• 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?

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Thought Questions

• 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

• 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

• 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

• 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.