Movement

IGCSEBiology3Movement in & knocked out(p) of mobile phones To seduce into or out of 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 hit-or-missly. Solutes flush toilet move into and out of cells by public exposure and osmosis line diffusion as the net movement of molecules from a section of their high intentness to a piece of their lower concentration charge 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. dissemination is one of the processes that allow this to happen. Diffusion occurs when particles move from a partake where they are in high concentration to a division where they are in low concentration. Diffusi on happens when the particles are devoid to move. This is true in gases and for particles dissolved in solutions. Particles diffuse dispirited a concentration gradient, from an battlefield of high concentration to an line of business 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 | enteral cavity |blood in capillary of villus | |lungs |oxygen | alveolar air space |blood circulating around the lungs | In the intestine, the concentration of molecules used by the body for energy, growth and repair are in higher concentration in the enteral cavity than in the...If you want to get a lucullan essay, order it on our website: BestEssayCheap.com

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