1. Cell Transport

2. Cell Transport
Moving substances across a cell membrane

3. But first, a spot of tea ...

4. Cell Transport Passive Transport (requires no energy)
Diffusion: movement from an area of high concentration to low
Facilitated diffusion: membrane proteins help
Osmosis: water diffuses
Active Transport (requires energy and a protein "pump" to move substances from an area of low concentration to high)
Bulk Transport (engulfing big particles)
Endocytosis: movement into a cell
Exocytosis: movement out of a cell

5. Passive transport: DIFFUSION
Small particles and those without a charge move down a concentration gradient (from a region of high concentration to one of low concentration).
Requires no energy.
Passive Transport Video Clip

7. Passive transport: Facilitated DIFFUSION
Small particles and those without a charge move down a concentration gradient (from a region of high concentration to one of low concentration) with the help of membrane proteins.
Requires no energy.

8. Passive transport: Osmosis
Water moves down a concentration gradient (from a region of high concentration to one of low concentration).
Requires no energy.

9. Passive vs Active transport

10. Cell Transport Vocabulary and Practice Powerpoint

11. Why?

12. Why not?

13. Potato Lab

14. Potato Lab

15. Potato Lab

16. Active Transport:
Requires energy and protein "pumps" in the membrane to move particles UP a concentration gradient (from an area of low concentration to an area of high concentration.
Active Transport Video Clip

17. Large substances pass through the membrane by being "engulfed."
Bulk Transport:
Large substances pass through the membrane by being "engulfed."
Endocytosis: movement INTO a cell.
Exocytosis: movement OUT of a cell.
Bulk Transport: Amoeba Feeds Video Clip

19. Factors affecting diffusion:
Surface to volume ratio
of cell
of dispersing particle
Temperature

20. Cell Transport Drawings

22. Diffusion (passive)

24. Active transport (requires pump and energy)

26. Diffusion

28. Active transport

30. Osmosis (passive) - the diffusion of water

33. Bulk transport: Endocytosis (requires energy)

35. Bulk transport: Exocytosis (requires energy)

40. Attachments
Passive_Transport.asf
Cell Transport Vocabulary and Practice.pptx
Active_Transport.asf
Amoeba Feeds!.mp4