transport across membranes Flashcards
1
Q
what is simple diffusion?
A
movements of molecules from a region of high concentration to a region of low concentration
2
Q
where does simple diffusion occur?
A
through the phospholipid bilayer
3
Q
how is diffusion increased by?
A
-higher concentration gradient
-shorter diffusion distance
-larger surfacearea
-smaller molecule
-increased temperature
-being non-polar or fat soluble
4
Q
what is facilitated diffusion?
A
process of diffusion but for polar molecules or ions that cannot pass directly through the bilayer
5
Q
what is active transport?
A
movements of molecules against the concentration gradient
6
Q
what is osmosis?
A
movement of water from a region of high water concentration to an area of low water concentration
7
Q
what is bulk transport?
A
-endocytosis
-exocytosis
