Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
|
Active vs. Passive: # of molecules? |
Passive: 1 at a time Active: many at a time, bulk transport |
|
|
3 types of passive transport |
Diffusion Osmosis Facilitated diffusion |
|
|
Diffusion |
Spreading of molecules (high to low) WITH conc gradient |
|
|
Osmosis |
Diffusion of water across a selectively permeable membrane WITH conc gradient |
|
|
Facilitated diffusion |
Molecules are binded to carrier proteins which flip molecules to the other side of the membrane |
|
|
Carrier proteins |
Active Same as facilitated diff. but cell energy is used to move molecules across membrane AGAINST [gradient] (low- high) |
|
|
Endocytosis |
Active 2 types Phagocytosis: (cell eating) Large particles/ whole cells enter the cell... Enter as a food vacuole Pinocytosis: (cell drinking) Bulk transport of dissolved solutes/fluids into the cell...Enter as a vesicle ...Enter as a vesicle |
|
|
Carrier Proteins Process |
1. Solute binds to carrier protein 2. Carrier protein uses energy (ATP) to flip over + release solute molecule to the other side of the membrane 3. Carrier protein flips back for another solute molecule |
