Cette leçon contient 12 diapositives, avec diapositives de texte.
La durée de la leçon est: 60 min
Éléments de cette leçon
Potato experiment
Slide 1 - Diapositive
Diffusion
The movement of a substance from an area of high concentration to an area of low concentration of that substance.
Diffusionspeed depends on the temperature.
Slide 2 - Diapositive
actief/passief transport
Slide 3 - Diapositive
active / passive transport
Slide 4 - Diapositive
Osmosis
= diffusion of water through a semipermeable membrane
= the movement of water from a place with a low concentration to a place with a high concentration
water follow solute
Slide 5 - Diapositive
Osmosis
Slide 6 - Diapositive
Osmosis in animal cells
hypotone solution OUTSIDE of the cell
water goes in by osmosis and the cells burst
isotone solution OUTSIDE of the cell
no osmosis, no difference in osmotic pressure
hypertone solution OUTSIDE of the cell
water leaves the cell through osmosis, the cells shrink
Slide 7 - Diapositive
osmosis in a plant cell
Slide 8 - Diapositive
Slide 9 - Diapositive
Slide 10 - Diapositive
Discussion #1
The plant cells in the hypotone solution absorbed water through the process of osmosis.
The osmotic pressure in the cells was larger then the surroundings of the cells. Osmosis is the movement of water from a low to a high osmotic pressure. The mass (length and width, firmness) got larger, because of this water entering the plant cells. These cell were now in turgor/turgid.
Slide 11 - Diapositive
Discussion #2
.
The plant cells in the hypertone solution lost water through osmosis. Their surrounding was filled with a high osmotic pressure (high concentration). Thus water moves from the low osmotic pressure area(the cells) to the high osmotics pressure area (the surroundings). Thus plasmolysis happened
La durée de la leçon est: 60 min
