9.19 Membrane Properties - Passive Transport Flashcards
what are the three factors influencing diffusive flux of a non-electryolite molecule into the cell?
- concentration gradient
2 time/distance - lipophilicity/size
in general, lipophilic molecules can more easily ________ in the plasma membrane and can cross more _______
partition
cross
what is Fick’s First Law?
J = D*change in [C]/[x]
rate of proportion is directly proportional to ___________
concentration gradient
net flow of water across a semipermeable membrane in response to a gradient in the chemical activity of water
osmosis
osmotic pressure
The osmotic pressure of solution A is the value of the hydrostatic pressure that must be applied to that solution to stop the net flux of water into the solution.
the greater the number of osmotically active solutes, the ________ the hydrostatic pressure
higher
0.1 M solution is _____ osmolar
0.1
0.1 M NaCl solution would be ____ osmolar.
0.2
the tendency of a molecule to partition in lipid:
lipophilicity