6.2 Cell Membrane and Transport Flashcards
1
Q
cell membrane structure
A
phospholipid bilayer
2
Q
fluid mosaic model
A
a mosaic of lipids, proteins, and carbohydrates that moves fluidly
3
Q
cell membrane proteins
A
- transporters (channels and pumps)
- enzymes
- cell surface receptors
- cell surface identity markers (antigens)
- cell junctions
- attachments to cytoskeleton
4
Q
cell-cell recognition
A
glycolipids and glycoproteins
5
Q
diffusion
A
net movement of particles from a region of higher concentration to a lower concentration
6
Q
dynamic equilibrium
A
both sides of divider have about equal concentration, but particles are still moving across the divider
7
Q
simple diffusion
A
small, nonpolar particles move directly across lipid bilayer
8
Q
facilitated diffusion
A
small, charge or polar particles move across membrane via protein channels
9
Q
osmosis
A
