Passive and Active Transport

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Passive and Active Transport
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Passive Transport

• Movement of material into and out of a cell
• No energy required just concentration gradient
• EX Diffusion

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Active Transport

• Material moves against a concentration gradient
  (from low to high)
• Bicycle and hill example

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One Type of Active Transport

• Substance moves across a membrane by binding to
  transport protein (similar to facilitated
  diffusion except moving from low to high conc.)
• Needs ATP

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Active Transport

• Sodium/Potassium ATPase

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Second Type of Active Transport

• Material enters a cell by becoming enclosed in a
  membrane vesicle
• Lets Draw!

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Examples of Membrane Bound Active Transport

• Endocytosis transporting material into cell by
  vesicle
• Exocytosis transporting material out of cell by
  vesicle

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Exocytosis
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• Pinocytosis small liquids are taken into cell by
  vesicle
• Phagocytosis solid particles ingested into cell
  by vesicles

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Endocytosis

• Phagocytosis

Pinocytosis Formation of coated pits