cell biology - osmosis

Question 1

what is osmosis?

Answer 1

the diffusion of water from a dilute solution (low concentration) to a concentrated solution (higher concentration) through a partially permeable membrane

Question 2

what is the function of a partially permeable membrane?

Answer 2

allows some molecules to pass through but not all

Question 3

what is the concentration of water in a dilute solution?

Answer 3

high

Question 4

what is the concentration of water in a concentrated solution?

Answer 4

low

Question 5

what is the concentration of the cytoplasm?

Answer 5

low concentration of water

Question 6

what is the affect of osmosis on a cell when it is placed in water?

Answer 6

water will move from outside the cell into the cell, causing the cell to expand and in some cases burst (low to high)

Question 7

what is the affect of osmosis on a cell when placed in a concentrated solution?

Answer 7

water move out of the cell and cell will shrink

Question 8

what happens to a plant cell when placed in water?

Answer 8

water will move into the cell and expand but it won’t burst as the cell wall stops it. scientists say it is turgid

Question 9

what happens to a plant cell when placed in a concentrated solution?

Answer 9

water will move out of the cell causing it to shrink. cell is now flaccid