lab 1 - osmosis

Question 1

biological solutions contain ___?

Answer 1

a solvent and solutes
water and particles such as ions, proteins, enzymes, DNA, etc.

Question 2

osmosis

Answer 2

type of diffusion in which water moves through the plasma membrane
concentration of solute particles across the membrane influences direction of movement.

Question 3

osmotic potential

Answer 3

the predicted (or potential) direction that water will move
determined by the solute concentration across the plasma membrane

Question 4

hypertonic solution

Answer 4

a solution that has a greater concentration of solutes compared to another solution

Question 5

hypotonic solution

Answer 5

a solution that has a lower concentration of solutes compared to another solution

Question 6

isotonic solution

Answer 6

when both solutions have the same concentration of solutes

Question 7

tonicity

Answer 7

the tonicity of a solution is basically how much solutes it has compared to another solution (always relative)
can be hyper, hypo, or iso tonic

Question 8

the net flow of water is always from ____ to ____ solutions

Answer 8

hypo to hyper tonic solutions

Question 9

what is the net flow of water when a solution is isotonic

Answer 9

there is no net flow

Question 10

what happens to cells in a hypertonic solution

Answer 10

they will lose water and shrivel (crenate)
they lose water volume

Question 11

what happens to cells in a hypotonic solution

Answer 11

they will absorb water and may burst (lyse)
they gain water volume

Question 12

what happens to cells in an isotonic solution

Answer 12

they will not lose or gain water - no net changes in water volume

Question 13

brownian motion

Answer 13

responsible for diffusion
the random motion of particles in a solution
particles are constantly packed close together and bumping into each other, so they move to where there is less bumping together
kinetic molecular theory