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Cellular Transportation

Cellular Transportation. Maintaining Equilibrium. Cellular Transport. Passive Transport. Movement of particles across the cell membrane without using energy. Three Modes of Passive Transport. Diffusion. Facilitated Diffusion . Osmosis. Cellular Transport. Diffusion.

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Cellular Transportation

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  1. Cellular Transportation Maintaining Equilibrium

  2. Cellular Transport Passive Transport • Movement of particles across the cell membrane without using energy Three Modes of Passive Transport • Diffusion • Facilitated Diffusion • Osmosis

  3. Cellular Transport Diffusion • Movement of particles from an area of high concentration to an area of lower concentration Initial Conditions Diffusion Low High High Low

  4. Cellular Structure and Function Cellular Transport • Diffusion is controlled by • Temperature • Pressure • Concentration Dynamic Equilibrium • Reached when diffusion of material into the cell equals diffusion of material out of the cell • Molecules continue to move, but the overall concentration remains the same.

  5. Cellular Structure and Function Cellular Transport Diffusion in a Cell

  6. Cellular Structure and Function Cellular Transport Facilitated Diffusion • Movement of materials across the plasma membrane using proteins Channel Proteins Carrier Proteins

  7. Cellular Structure and Function Cellular Transport Osmosis • Diffusion of water across a selectively permeable membrane Three Types of Solutions • Isotonic • Hypotonic • Hypertonic

  8. Passive Transport

  9. Cellular Structure and Function

  10. Cellular Structure and Function Cellular Transport Isotonic Solution • Water and dissolved substances diffuse into and out of the cell at the same rate. Blood Cell Plant Cell 11,397x

  11. Cellular Structure and Function Cellular Transport Hypotonic Solution • Solute concentration is higher inside the cell. • Water diffuses into the cell. Plant Cell Blood Cell 13,000x

  12. Cellular Structure and Function Cellular Transport Hypertonic Solution • Solute concentration is higher outside the cell. • Water diffuses out of the cell. Blood Cell Plant Cell 13,000x

  13. Cellular Structure and Function Cellular Transport Active Transport • Movement of particles across the cell membrane using energy Active Transport Using Carrier Proteins

  14. Cellular Structure and Function Cellular Transport Types of Active Transport Pumps • Na+/K+ATPase pump • Moves three Na+ ions out of the cell and two K+ ions into the cell

  15. Cellular Structure and Function Cellular Transport Endocytosis • Process by which the cell surrounds and takes particles into the cell Exocytosis • Secretion of material out of the plasma membrane

  16. Active Transport

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