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ACTIVE TRANSPORT

ACTIVE TRANSPORT. Mr. Cistaro 11/11/12. Molecular membrane. ACtive TRANSPORT – swimming against the current. Active Transport requires energy. Molecular Transport Endocytosis Phagocytosis Pinocytosis Exocytosis WORD CHECK. Endo / Exo ??? / ??? Cytosis ???.

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ACTIVE TRANSPORT

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  1. ACTIVE TRANSPORT Mr. Cistaro 11/11/12

  2. Molecular membrane

  3. ACtive TRANSPORT – swimming against the current • Active Transport requires energy. • Molecular Transport • Endocytosis • Phagocytosis • Pinocytosis • Exocytosis • WORD CHECK. • Endo / Exo ??? / ??? • Cytosis ???

  4. Molecular Transport • Cells use E (ATP) to pump ions/compounds against the concentration gradient (from low concentration to high concentration). • EXAMPLE • Sodium-Potassium Pump It moves sodium ions out of cells while moving potassium ions in. • Pumps out 3 sodiums for every 2 potassiums it pumps in. • It occurs in animals. • It has a particular significance for excitable cells such as nerve cells, which depend on this pump for responding to stimuli and transmitting impulses.

  5. Molecular Transport • Na+/K+Pump

  6. Molecular Transport

  7. Endocytosis • The movement of bulk materials into cells. • Phagocytosis - The movement of solids. • Pinocytosis - The movement of liquids.

  8. ENDOCYTOSIS - PHAGOCYTOSIS • Phagocytosis (from Ancient Greek φαγεῖν (phagein) , meaning "to devour", κύτος, (kytos) , meaning "cell", and -osis, meaning "process") is the cellular process of engulfing solid particles by the cell membrane.

  9. ENDOCYTOSIS - PHAGOCYTOSIS • Scanning electron micrograph of a phagocyte (yellow, right) phagocytosing anthrax bacilli (orange, left)

  10. Endocytosis - pinocytosis • Pinocytosis is the process in which small particles are brought into the cell, forming a vesicle, and fuse with lysosomes to break down the particles.

  11. Endocytosis - pinocytosis • The difference between Phago and Pinocytosis?

  12. Endocytosis - pinocytosis • The difference between Phago and Pinocytosis?

  13. Exocytosis • The movement of bulk materials out of cells. • From Greek ἔξω "out" and κύτος "receptacle“ / "cell" • Example: secretion of enzymes

  14. Weird words & QUESTIONS • ??? • Quiz next week.

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