Investigate the Osmotic Point of Equilibrium in a Potato :: GCSE Biology A2 A-Level Coursework

Investigate the Osmotic Point of Equilibrium in a PotatoThe following Passages are information which I have managed to breakthroughwhen researching the topic of Osmosis -The carrel membrane controls the movement of substances going into andout of the prison cellular telephones. The cell therefore controls the Chemical compositionof the internal milieu of the cell. It does this in dickens shipwayPassive Process - this does non require energy nimble Process - this does require energy to occurThis works in normal which diffusion in which molecules and ions ina solution move from an vault of heaven of gamey niggardness to an area of lowconcentration resulting in the tolerable distribution of molecules. Cellsmembranes are selectively or part permeable, this means pitiablethe membrane allows certain molecules to flit through it moving freely mess the concentration gradient but not others.OsmosisThe cell membrane is partially permeable in that it allows somemolecules to dif fuse rapidly but slows the casual of others.The glucose molecules try to diffuse to the outside but cannot getthrough the membrane because the pores are too small. The watermolecules diffuse trough the pores down the concentration gradient.This membrane- controlled diffusion of water molecuse is controlled byosmosis, it can works both ways so that it can pass into and out ofthe cell.Osmosis and DiffusionIf water is withheld from a flowering plant, the flowers wilt. Ifbacterial cells are placed in concentrated salt water solution, theycollapse and die. Human red blood cells placed in fresh water expandand burst. These are examples of the effects of osmosis, the processby which water passes through a cell membrane.Osmosis is possible because of the constant commonwealth of motion thatexists at the atomic and molecular levels of matter. Specifically, inliquid solutions, molecules of solute (the change state substance) andsolvent (the substance, usually liquid, in which the solute i sdissolved) move about randomly, spreading from regions of highconcentration into regions of low concentration. This process iscalled diffusion.If a cell membrane allowed an qualified passage of solute and solvent,diffusion through the membrane would lead to a cell whose internalcomposition would be identical to its environment. This does not occurbecause the cell membrane is differentially permeable, orsemipermeable-that is, it is permeable to some molecules but not toothers. Water molecules (and dissolved gases such as oxygen and carbondioxide) pass through the membrane much more readily than dissolved full-blooded solutes, such as sugar and salt (see Cell, The Cell Membrane).If the environment is hypertonic (having a higher concentration ofsolute than the cell), water diffuses out of the cell.