The%20Cell%20in%20Action

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The Cell in Action

• Chapter 5 - section 1 2

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Chapter Preview

• Exchange with the Environment
• Cell Energy

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Exchange with the Environmentsection 1

• NEW TERMS
• Diffusion
• Osmosis
• Passive Transport
• Active Transport
• Endocytosis
• Exocytosis

• OBJECTIVES
• Explain the process of diffusion
• Describe how osmosis occurs
• Compare and contrast passive transport and active
  transport
• Explain how large particles get into and out of
  cells

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What is Diffusion

• DIFFUSION - is the movement of particles from an
  area where there concentration is high to an area
  where the concentration is low.

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What is Osmosis

• OSMOSIS - is the diffusion of what through the
  cell membrane
• Left Pictures - A healthy red blood cell
• Right Picture - A red blood cell that is in pure
  water.

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Moving Small Particles

• Passive transport - does not require energy
• Active Transport - requires energy in the form of
  ATP

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Moving Larger Particles

• Endocytosis - the movement of large molecules
  into the cell using a vesicle

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Moving Larger Particles

• Exocytosis - the movement of large molecules out
  of the cell using a vesicle

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Cell Energysection 2

• NEW TERMS
• Photosynthesis
• Cellular respiration
• Fermentation

• OBJECTIVE
• Describe the process of photosynthesis and
  cellular respiration.
• Compare and contrast cellular respiration and
  fermentation.

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From Sun to Cell

• Photosynthesis - plant cells use the energy from
  the sun to make food (glucose) from carbon
  dioxide and water using chloroplasts.

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Getting Energy from Food (with Oxygen)

• Cellular Respiration - Mitochondria will break
  down food (glucose) with oxygen to form carbon
  dioxide, water, and energy (ATP)

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Getting Energy from Food (without Oxygen)

• Fermentation - the production of ATP without
  oxygen. 2 types
• In Muscles - lactic acid
• Yeast - alcohol