If cells of onion peel and RBC are separately kept in hypotonic solution, hypertonic, solution and isotonic solution what will happen to each of them? Explain with the help of diagram
Answers
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Hypotonic solution is a solution which contains lesser solute concentration. If RBC is kept in hypotonic solution then the water molecules will move from hypotonic solution to RBC. This process is called as osmosis in which the water molecules move from lower solute concentration to higher solute concentration through cell membrane RBC. Due to this, the cell membrane of RBC will not be able to tolerate the pressure and it will burst eventually.
If onion peel is kept in hypotonic solution then the water molecules will move from hypotonic solution to onion cells. This process is called as osmosis in which the water molecules move from lower solute concentration to higher solute concentration through the cell wall of onion. As onion cell possess cell wall along with the cell membrane the onion cell will take a longer time to burst than RBC but it will burst eventually.
When the cells are kept in a hypotonic solution, endosmosis occur, i.e., inward movement of water. ... The RBCs burst easily because they are animal cells and do not have cell wall. The onion peel possess cell wall which makes it resistant to bursting due to swelling caused by endosmosis.
Hence, if a red blood cell is placed in a hypotonic solution, water would naturally enter the cell through osmosis as the concentration of water in the RBC is lower. Since the RBC does not have any cell wall to maintain cell rigidity and shape, it will expand due to the entry of water until it eventually burst