Supporting diffusion: Engaging the innovation-decision process for synchromodal class sessions
Diffusion unit class 1
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Transcript of Diffusion unit class 1
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DiffusionThe spread of particles through random
motions from regions of higher concentrations to regions of lower
concentrations
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Simple DiffusionRequires NO energy
Molecules move from areas of HIGH to Low concentration
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DiffusionDiffusion is a PASSIVE process which means no energy is used to make the molecule move, they have a natural KINETIC ENERGY
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Diffusion of Liquids
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When the molecules are even throughout a space - it is called EQUILIBRIUM
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Concentration gradient - a difference between concentrations in a space.Molecules will always move down the concentration gradient, toward areas of lesser concentration.
Think of food coloring that spreads out in a glass of water, or air freshener sprayed in a room.
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Diffusion through a MembraneSolute moves DOWN concentration gradient (HIGH to LOW)
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How Diffusion Workshttp://highered.mcgraw-hill.com/sites/
0072495855/student_view0/chapter2/animation__how_diffusion_works.html
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Turn to your partner and discuss different examples
of diffusion in your everyday life.
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Some major examples of diffusion in biology: Gas exchange at
the alveoli — oxygen from air to blood, carbon dioxide from blood to air.
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Diffusion in Photosynthesis
Gas exchange for photosynthesis — carbon dioxide from air to leaf, oxygen from leaf to air.
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Diffusion in Respiration
Gas exchange for respiration — oxygen from blood to tissue cells, carbon dioxide in opposite direction.
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Diffusion in Transfer of Transmitter Substance
Transfer of transmitter substance — acetylcholine from presynaptic to postsynaptic membrane at a synapse.
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Diffusion of Water- Osmosis
Osmosis — diffusion of water through a semipermeable membrane.
http://www.youtube.com/watch?v=sdiJtDRJQEc
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JournalsDefine the following terms in your own
words:-diffusion-equilibrium-osmosis