SPEC POINT 2.3

Question 1

What is osmosis?

Answer 1

The net movement of water molecules from a solution with a lower concentration of solute to a solution with a high concentration of solute through a partially permeable membrane

Question 2

How does the partial permeability of the surface membrane of the cells allow osmosis to take place?

Answer 2

Is a barrier to some solutes, but not water. Enables a concentration gradient of solutes/water

Question 3

What happens when water moves into a cell via osmosis? (animal vs plant)

Answer 3

Animal cell - can burst

Plant cell - cell wall prevents bursting

Question 4

What happens when water moves out of a cell via osmosis? (animal vs plant)

Answer 4

Animal cell - shrivels

Plant cell - vacuole and cytoplasm shrink away from the cell wall