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ACTIVITY You can check what happens to the red blood cells, but with other components. Cut a few slices of cucumber and eggplant, Prepare a solution using water and table salt and place in deep container, such as a glass. In another bowl put water only. Add a slice of cucumber on each container. Wait a few minutes and look what happened. Repeat the same procedure with the eggplant and compare them. Discuss with colleagues what happens in the two experiments and establish relationships between them and the mechanism of osmosis. After checking and discuss what happened with cucumber and eggplant, are you able to explain what happens with the lettuce leaves? Then expose their findings to their peers and compare their conclusions. In figure osmosis in erythrocyte you learned about osmosis in animal cell. In plant cells, this mechanism also occurs. In hypertonic medium for water outlet through the cell vacuole, causing decrease in cell volume. With this cell membrane moves away from the cell wall. This mechanism is known as plasmolysis. The plant cell usually does not die, and if placed in a hypotonic environment, water will pass through its membrane causing it to return to its natural size. The reverse phenomenon of plasmolysis is deplasmólise. Scheme of the mechanisms plasmolysis and deplasmólise. Osmosis: the natural balance and necessary ...
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AKTIVNOST Možete provjeriti što se događa u crvenim krvnim stanicama, ali s drugim komponentama. Izrežite nekoliko kriški krastavaca i patlidžana, pripremiti rješenje koristeći vodu i sol za jelo i mjesto u dubokoj posudi, poput stakla. U zdjelu stavite vodu samo. Dodaj kriška krastavca na svaki kontejner. Pričekajte nekoliko minuta i pogledajte što se dogodilo. Ponovite isti postupak s patlidžanom i usporedite ih. Razgovarajte s kolegama što se događa u dva pokusa te uspostavljanje odnosa između njih i mehanizam osmoze. Nakon provjere i razgovarati o tome što se dogodilo s krastavcima i patlidžana, možete li objasniti što se događa s lišćem salate? Tada izlagati svoja otkrića sa svojim vršnjacima i usporedite svoje zaključke. Na slici osmoze u eritrocitima ste naučili o osmoze u životinjskom ćeliji. U biljnim stanicama, taj mehanizam također pojavljuje. U hipertonično medij za vodu utičnice kroz stanične vacuole, što uzrokuje smanjenje volumena stanica. S ovom stanične membrane udaljava iz stanične stijenke. Ovaj mehanizam je poznat kao plasmolysis. Stanica biljke obično ne umire, a ako se nalazi u Hipotono okoliša, voda će proći kroz membranu uzrokujući da se vrate u svoje prirodne veličine. Obrnuti fenomen plasmolysis je deplasmólise. Shema mehanizmi plasmolysis i deplasmólise. Osmoze: prirodno stanje i neophodno ...