IGCSEBiology3Movement in & reveal of mobile phones To seduce into or out of electric electric cells, dissolved substances have to cross the cell membranes. solute ~ particles in solution ( e.g. glucose, sodium ions, chloride ions ). solvent ~ liquid in which the particles ar dissolved ( e.g. water ). Solute and solvent molecules move well-nigh randomly. Solutes croupe move into and out of cells by dispersal and osmosis line diffusion as the net movement of molecules from a section of their high intentness to a piece of their lower concentration bolt sight a concentration gradient, as a force of their random movement. spreading Dissolved substances have to pass through the cell membrane to get into or out of a cell. spreading is one of the processes that allow this to happen. Diffusion occurs when particles move from a carry on where they are in high concentration to a office where they are in low concentration. Diffusion happens when t he particles are necessitous to move. This is true in gases and for particles dissolved in solutions. Particles diffuse down a concentration gradient, from an battlefield of high concentration to an landing field of low concentration. The greater the difference in concentration, the faster the appraise of diffusion. [pic] Describe the importance of diffusion of gases and solutes and of water as a solvent.
Examples of diffusion: |location |particles move |from |to | |intestine ! |digested food products | enteric cavity |blood in capillary of villus | |lungs |oxygen | dental consonant air space |blood circulating around the lungs | In the intestine, the concentration of molecules used by the body for energy, growth and quicken are in higher concentration in the intestinal cavity than in the...If you want to get a troubled essay, order it on our website:
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