membranes and transport week 2 Flashcards
what types of molecules can freely pass through the cell membrane
hydrophobic molecules(gases) and small, uncharged molecules(water,indole, glycerol)
what types of molecules need a type of transporter to cross the membrane?
large, uncharged molecules(glucose, sucrose) and ions
changing the pH will remove what type of membrane proteins?
anchored protein
and peripheral proteins
detergents will remove what type of membrane protein
integral proteins
N-terminal is on the outside or inside of cell
amino terminus(N-terminus) is on outside for the most part
C-terminal is on the outside or inside of cell
Carboxyl terminus (C-terminal) is on inside for the most part
As the temperature increases what types of fatty acids increase in membranes
saturated fatty acids
As the temperature decreases what types of fatty acids increase in membranes
unstaturatred fatty acids
Which type of transbilayer is faster between flip-flop and lateral diffusion?
lateral diffusion happens very fast and flip flop is very slow
Flippase function
move lipid from outer to inner membrane
floppase function
from the inner to the outer membrane
Scramblase function
moves lipids in either direction, toward equilibrium.
simple diffusion
nonpolar compounds only, down concentration gradient
Facilitated diffusion
down electrochemical gradient through a pore
Primary active transport
against electrochemical gradient by ATP
