cell membranes Flashcards
1
Q
another name for the cell surface membrane
A
plasma membrane
2
Q
it contains a double layer of…
A
phospholipids
3
Q
diffusion
A
lquid/gas moves high-low conc but only if molecules are small enough to pass through gaps in phospholipids
4
Q
osmosis
A
water molecules, partially permeable high-low conc (water potential)
5
Q
active transport
A
low-high conc, NEEDS ENERGY, substance fits specific carrier protein
6
Q
what provides energy for active transport?
A
ATP
7
Q
what is another name for carrier proteins
A
pumps
8
Q
facilitated diffusion
A
molecules too big to diffuse, carrier proteins for every specific substance. molecule fits to end of carrier causing shape change so it can diffuse
