Reading...
Play button
Play button
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;
10 Cards in this Set
- Front
- Back
|
Filtration
|
physical pressure forces molecule through membrane
|
|
|
Simple diffusion
|
movement of particles from high to low concentration
|
|
|
Osmosis
|
Simple diffusion of H2O
|
|
|
Membrane Transport
|
-Selectively permeable: Allows some substances to pass
-Only small uncharged molecules or fat soluble molecules can pass through membrane w/out help -other molecules require "help"- proteins in plasma membrane can form channels or pumps to help other molecules pass through. |
|
|
Facillitated diffusion
|
carrier mediated transport
-form channels |
|
|
Active Transport
|
expenditure of energy (ATP) to move solute across membrane UP concentration gradient
-pumps |
|
|
Endocytosis
|
into the cell. Membrane invaginates and forms a vesicle. Three types (phagocytosis, pinocytosis, and receptor mediated endocytosis)
|
|
|
phagocytosis
|
"cell eating" membranous vesicle is called "phagosome" Fuses w/ a lysosome-acts as the "stomach" of the cell.
|
|
|
Pinocytosis
|
"Cell Dringking" plasma membrane surrounds a tiny bit of extracellular fluid. Pinocytotic vesicle
|
|
|
Vesicular Transport
(Exocytosis) |
Out of the cell. Substanse to be released is first enclosed in a membrane-walled sac or vesicle. Migrates to membrane and fuses w/ it to dump out contents.
|
