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Active Transport

Active Transport. Ch 8.

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Active Transport

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  1. Active Transport Ch 8

  2. It is possible for particles to travel in the reversedirection across the membrane and have particles travel from an area of ______ concentration to an area of_High_____ concentration, but in order to counteract the force of diffusion the cell must expend energy. This process is called _active transport_. Low

  3. Active transport is the movement of materials through a membrane ____________ a concentration gradient. Active transport requires ____________. AGAINST ENERGY

  4. high concentration low concentration

  5. The energy for active transport comes from ______(Adenosine Triphosphate) generated inside mitochondria. ATP

  6. This process requires specialized proteins, which are __________proteins to bind with the particle and transport it. Carrier

  7. Example: Sodium/Potassium pump in cell membranes. Sodium/Potassium Pump

  8. Summary of Passive and Active Transport: & Osmosis GREAT SUMMARIZER

  9. Thus, far we have talked about the movement of ________ particles traveling across the membrane. small

  10. However, __________ particles are able to cross to and do so by any of these four active transport processes: Large • 1) Exocytosis • 2) Endocytosis • 3) Pinocytosis • 4) Phagocytosis

  11. Root Greek or Latin meaning Endo- inside, within Exo- external, out Phago- eat Pino- drink

  12. EndocytosisvsExocytosis: BOTH REQUIREENERGY Largeparticles are transported across the membrane in membrane bound vesicles. Plasma membrane

  13. Endocytosis: • The process where a cell surrounds and takes____ material from its environments. • The particledoes not pass through the membrane, it is simply __________ and enclosed in engulfed

  14. Exocytosis: • The reverse process where materials are ____________ or secreted from a cell. • This is used to ____________and secreted substances (ex: hormones) produced by the cell. expelled rid wastes

  15. When exocytosis is getting rid of cell wastes, the process is called ___________ • When exocytosis is pushing useful substances out of the cell, then the process is known as ____________ excretion secretion

  16. Coming in Endocytosis Pushing out Exocytosis

  17. Pinocytosisvs.Phagocytosis Both take materials IN ENTER

  18. Pinocytosis: (DRINKS) • Pinocytosis is when the cell ________. • Pinocytosis deals with __________. • Pinocytosis is a process that is happening all of the time. pinches liquids

  19. Pinocytosis: • The liquid is enclosed in “vesicles”, formed by invagination of the plasma membrane. These vesicles then move into the cell.

  20. Phagocytosis: • Phagocytosis is when the cell _________ • Phagocytosis deals with _________. • Once the vesicle has formed, it travels into the cytoplasm where it will fuse with ___________ that will kill and digest the engulfed material. engulfs solids lysosome

  21. Phagocytosis: Used by white blood cells to engulf bacteria or infected cells • Phagocytosis is process the human body uses to destroy dead or foreign _______. cells

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