M10 TRANSPORT MECHANISMS Flashcards
Movement of solutes to an area of high concentration to an area of low concentration
Simple Diffusion
Difference in concentration of polar solutes between 2 areas.
Example:
ions
glucose
Facilitated Diffusion
FACILITATED DIFFUSION
2 TYPES
1. C_________ m_________ diffusion
L______ C________
G_____ C________
2. C_________ m_________ d___________
- Channel mediated diffusion
Leak Channel
Gated Channel - Carrier mediated diffusion
Passive movement of solvent through a selectively permeable membrane
Osmosis
2 channel used during osmosis across a cell membrane
- Lipid bilayer
- Aquaporin – Protein Channel
Requires cellular energy
Active processes
2 types of active processes
- Active Transport
- Vesicular Transport
Movement of solute against the concentration gradient
ACTIVE TRANSPORT
2 types of active transport
- Primary Active transport
- Secondary Active transport
- Uses transmembrane channels known as ions pumps
- Move against the concentration.
- Low concentration to high concentration
- Require energy (ATP)
Primary Active Transport
High to low concentration,
will produce energy that will let the movement of a molecule from low concentration to high concentration
Secondary Active Transport
Primary Active Transport – Ion pump step by step process
- ATP will attach and stimulate/ change the shape of the ion pump
- ATP will allow 3 Na ion into the pump
- ATP will change into ADP and P
- ADP will be released back into the cytoplasm as P will remain attach to the pump
- Na ions will travel out of the pump
- P will attract 2 K ions into the pump
- K ions will travel out of the pump
- P will be released
- Pump will go back to its original shape.
2 Types of Secondary Active Transport
- Antiport
- Symport
2 substances are move in the same direction
Symport/ Symporter
2 substances are move in the opposite direction
Antiport
