osmosis

Question 1

What is osmosis

Answer 1

-It is the net movement of water molecules from a region of high water potential to a region of low water potential, through a partially-permeable membrane.

Question 2

What is water potential

Answer 2

-Water potential is the tendency of water molecules in a system to move. It is denoted by the symbol Ψ and is measured in kiloPascals (kPa).

Question 3

What is the net movement of osmosis determined by

Answer 3

-Differences in water potential between two solutions connected by a partially-permeable membrane.

Question 4

Equation of water potential

Answer 4

water potential = solute potential + pressure potential

Question 5

When is equilibrium reached and osmosis stopped

Answer 5

-When the water potential on both sides of the membrane is equal

Question 6

what is isotonic solution

Answer 6

-When the water potential of a solution outside the cell is the same as the water potential inside the cell.
-So osmosis does not occur. Water will still move in/out randomly but
no net

Question 7

What is hypertonic solution

Answer 7

-When the water potential of a solution outside the cell is lower than the water potential inside the cell.

Question 8

What is hypotonic solution

Answer 8

-When the water potential of a solution outside the cell is higher than the water potential inside the cell.

Question 9

What is cytolysis

Answer 9

-Cell membranes are not able to withstand this pressure, causing the cells to burst

Question 10

-2 similarities in the movement of substances by diffusion and osmosis

Answer 10

-From high concentration to low
-Passive transport

Question 11

What is the water potential of pure water

Answer 11

-0 kPa

Question 12

Describe the effect of adding a solute on the water potential of pure water.

Answer 12

-makes it more negative

Question 13

How to calculate mitotic index

Answer 13

Number of cells undergoing mitosis/total number of cells