MEMBRANE TRANSPORT MECHANISM
OBJECTIVES <ul><li>Understand factors that influence membrane permeability </li></ul><ul><li>Know types of membrane transp...
MEMBRANE  PERMEABILITY <ul><li>Cell Membranes Are Selectively Permeable: </li></ul><ul><ul><li>Membranes allow flow of cru...
TRANSPORT  MECHANISMS <ul><li>Permeability Depends on </li></ul><ul><li>Characteristics of Solute: </li></ul>
MEMBRANE PERMEABILITY: TRANSPORTED SUBSTANCE
TRANSPORT MECHANISMS <ul><li>Active Transport </li></ul><ul><li>Passive Transport </li></ul>NOTE: Movement of substance ca...
PASSIVE TRANSPORT  MECHANISMS <ul><li>Passive Transport: </li></ul><ul><li>Simple Diffusion </li></ul>
PASSIVE  TRANSPORT MECHANISMS <ul><li>Passive Transport </li></ul><ul><li>Osmosis: </li></ul>
OSMOREGULATION <ul><li>Cell survival depends on balancing water uptake and loss </li></ul>
TONICITY <ul><li>Tonicity </li></ul><ul><li>Compares solute </li></ul><ul><li>concentrations of two solutions   </li></ul>...
TONICITY NOTE:  Solute particles cannot move across membrane!!!
PASSIVE  MECHANISMS   <ul><li>Passive Transport: </li></ul><ul><li>Facilitated Diffusion: </li></ul>
ACTIVE  TRANSPORT MECHANISMS <ul><li>Active Transport  </li></ul>
TRANSPORT OF LARGE MOLECULES <ul><li>Bulk Transport Mechanisms: </li></ul><ul><li>Endocytosis </li></ul>
TRANSPORT OF LARGE MOLECULES <ul><li>Bulk Transport Mechanisms: </li></ul><ul><li>Exocytosis </li></ul>
Upcoming SlideShare
Loading in …5
×

Lecture7 Upload.ppt

949 views
815 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
949
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
17
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Lecture7 Upload.ppt

  1. 1. MEMBRANE TRANSPORT MECHANISM
  2. 2. OBJECTIVES <ul><li>Understand factors that influence membrane permeability </li></ul><ul><li>Know types of membrane transport and proposed mechanisms </li></ul>
  3. 3. MEMBRANE PERMEABILITY <ul><li>Cell Membranes Are Selectively Permeable: </li></ul><ul><ul><li>Membranes allow flow of crucial materials in & out of cell while keeping out the unnecessary </li></ul></ul>
  4. 4. TRANSPORT MECHANISMS <ul><li>Permeability Depends on </li></ul><ul><li>Characteristics of Solute: </li></ul>
  5. 5. MEMBRANE PERMEABILITY: TRANSPORTED SUBSTANCE
  6. 6. TRANSPORT MECHANISMS <ul><li>Active Transport </li></ul><ul><li>Passive Transport </li></ul>NOTE: Movement of substance can be into or out of cell!!!
  7. 7. PASSIVE TRANSPORT MECHANISMS <ul><li>Passive Transport: </li></ul><ul><li>Simple Diffusion </li></ul>
  8. 8. PASSIVE TRANSPORT MECHANISMS <ul><li>Passive Transport </li></ul><ul><li>Osmosis: </li></ul>
  9. 9. OSMOREGULATION <ul><li>Cell survival depends on balancing water uptake and loss </li></ul>
  10. 10. TONICITY <ul><li>Tonicity </li></ul><ul><li>Compares solute </li></ul><ul><li>concentrations of two solutions </li></ul><ul><ul><li>Hypertonic solution </li></ul></ul><ul><ul><li>Hypotonic solution </li></ul></ul><ul><ul><li>Isotonic solution </li></ul></ul>
  11. 11. TONICITY NOTE: Solute particles cannot move across membrane!!!
  12. 12. PASSIVE MECHANISMS <ul><li>Passive Transport: </li></ul><ul><li>Facilitated Diffusion: </li></ul>
  13. 13. ACTIVE TRANSPORT MECHANISMS <ul><li>Active Transport </li></ul>
  14. 14. TRANSPORT OF LARGE MOLECULES <ul><li>Bulk Transport Mechanisms: </li></ul><ul><li>Endocytosis </li></ul>
  15. 15. TRANSPORT OF LARGE MOLECULES <ul><li>Bulk Transport Mechanisms: </li></ul><ul><li>Exocytosis </li></ul>

×