9.19 Membrane Properties - Passive Transport

Question 1

what are the three factors influencing diffusive flux of a non-electryolite molecule into the cell?

Answer 1

1. concentration gradient
   2 time/distance
2. lipophilicity/size

Question 2

in general, lipophilic molecules can more easily ________ in the plasma membrane and can cross more _______

Answer 2

partition

cross

Question 3

what is Fick’s First Law?

Answer 3

J = D*change in [C]/[x]

Question 4

rate of proportion is directly proportional to ___________

Answer 4

concentration gradient

Question 5

net flow of water across a semipermeable membrane in response to a gradient in the chemical activity of water

Answer 5

osmosis

Question 6

osmotic pressure

Answer 6

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.

Question 7

the greater the number of osmotically active solutes, the ________ the hydrostatic pressure

Answer 7

higher

Question 8

0.1 M solution is _____ osmolar

Answer 8

0.1

Question 9

0.1 M NaCl solution would be ____ osmolar.

Answer 9

0.2

Question 10

the tendency of a molecule to partition in lipid:

Answer 10

lipophilicity