Q4.A cell is placed in a solution ‘A’ and it swells up. What kind of solution is it? Why does it
happen?
Q4.A cell is placed in a solution ‘A’ and it swells up. What kind of solution is it? Why does it
happen?
Hey there Sol:
Osmosis is the diffusion of solvent molecules through a semi-permeable membrane from a region of low concentration to high concentration.
*Hypotonic solutions are the ones which have a lower concentration of solute than the inside the cell. Water diffuses into the cell to balance the solute concentration on either side (outside and inside) equal. Here the cell swells up due to entry of water by endosmosis.
*During endosmosis, when the cell is placed in a hypotonic solution (solution with less solutes and higher water potential) water moves from solution into the cells. This causes the cytoplasm to build the pressure against the cell wall. This pressure is called as turgor pressure. This pressure is exerted by the protoplast against the cell wall due to the entry of water is called as pressure potential. It is the turgor pressure in the plant cells which helps the plants to be erect. As the cell walls are strong, cells do not rupture but enlarge in size to cause extension in growth.
This happens if the solution is a hypotonic solution. In this solution, there's only a small amount of the solute when compared to the amount of water.
As there's more concentration of the molecules of water around it, it may get into the cell.
That's why it swells!
Thanks
Sol:
Osmosis is the diffusion of solvent molecules through a semi-permeable membrane from a region of low concentration to high concentration.
*Hypotonic solutions are the ones which have a lower concentration of solute than the inside the cell. Water diffuses into the cell to balance the solute concentration on either side (outside and inside) equal. Here the cell swells up due to entry of water by endosmosis.
*During endosmosis, when the cell is placed in a hypotonic solution (solution with less solutes and higher water potential) water moves from solution into the cells. This causes the cytoplasm to build the pressure against the cell wall. This pressure is called as turgor pressure. This pressure is exerted by the protoplast against the cell wall due to the entry of water is called as pressure potential. It is the turgor pressure in the plant cells which helps the plants to be erect. As the cell walls are strong, cells do not rupture but enlarge in size to cause extension in growth.
This happens if the solution is a hypotonic solution. In this solution, there's only a small amount of the solute when compared to the amount of water.
As there's more concentration of the molecules of water around it, it may get into the cell.
That's why it swells!
Thanks
