Diffusion ∙ Concentration gradient is the factor that determines the direction of the diffusion in all cases ∙ Molecular speed depends on molecular weight, temperature, and type of medium ∙ DiffusiWe also discuss several other topics like mme unl
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If you want to learn more check out Narrative Reasoning- how people understand and tell the stories of their lives Both OTA and OTR involved in all stages of intervention process Theory- provide a set of principles to organize and explain, no one correct theory What is the purpose of theori
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on occurs most easily in air than liquid then a semi solid ∙ The explanation of the mechanism of diffusion of molecules spread randomly from areas of high concentration to areas of lower concentration ∙ Diffusion occurs in air liquid and semi-solids ∙ The color spreads outward because there is a net movement of a substance from an area of high concentration to low concentration ∙ The greater the concentration of gradient the faster the diffusion rate ∙ The concentration gradient from high concentration to low determines the direction of the diffusion ∙ In the region of high concentration from each substance why is there a net movement of molecules outward? There are more molecules to collide with in the region of high concentration ∙ In general what is the effect of the type of medium on the diffusion rate? Diffusion rate is greater in fluid media than solid ∙ The average diffusion rate in a semi solid like agar is around 50mm/h over the first 15 minutes. What can you say about the diffusion rate in a liquid based on your results? It is greater than the diffusion speed in a semi solid∙ Based on your experiments you can say that the ammonium chloride Cloud forms? Closer to the HCL source ∙ The ammonium chloride Cloud forms closest to the substance with the higher molecular weight because the higher molecular weight substance diffuses more slowly than the lighter one ∙ The molecular weight of HCL is greater than that of ammonia and diffusion speed decreases as molecular weight increases ∙ Dialysis tubing is selectively permeable this means that some solutes will pass through and others not ∙ For a solid to diffuse across a membrane there must be unequal concentrations on either side of the membrane in the membrane is permeable to the solute ∙ Iodine is added to an unknown solution and it turns from a light yellow color to a blue-black color what does this indicate about the solution to the iodine was added? The unknown solution contain starch ∙ Which solute is too large to diffuse through a dialysis tubing membrane? Starch ∙ What factor determines which solutes can pass through the membrane of dialysis tubing? Molecular size ∙ What does the dialysis tubing represent in your experiment? A cell membrane ∙ What is the purpose of adding iodine into this experiment? It will indicate the presence of starch ∙ Dialysis tubing is rather stiff. What will you do to make it more pliable? I will soak it in water until it’s pliable ∙ What to do in your experiment diffuse from the dialysis tubing bag into the beaker? Glucose 2∙ Which solute could diffuse from the beaker into the bag? Iodine ∙ Which solute is too large to diffuse through the membrane? Starch ∙ Net diffusion will always occur from high to low concentration ∙ Which of the following is an example of molecular Movement by diffusion? A bottle of perfume is opened at the front of the classroom and 10 minutes later you can smell it in the back of the classroom ∙ Which of the following is true of passive transport mechanisms like diffusion? The transports substances from high areas of concentration to low ∙ Send membrane transport mechanisms utilized by cells are active, but others are passive. Which of the following are ways in which active and passive mechanisms differ? Active mechanisms require the use of cellular energy in the form of ATP, active mechanisms can be used to transport substances from low concentration to high, passive mechanisms like diffusion can only transport from high concentration to low ∙ How does a concentration gradient affect diffusion rate? The bigger the gradient the faster the rate ∙ Oxygen diffuses from the blood to the tissues of the body. Which of the following statements is true of the movement of oxygen? It moves from an area of high concentration in the blood to low concentration in the tissues ∙ Diffusion is a passive process because no cellular energy is used for this mechanism 3∙ Diffusion is considered a passive transport mechanism this means that sell do not expend ATP in order for diffusion to occur ∙ If your experiments were allowed to continue for an indefinite period of time what would eventually happen? Dynamic equilibrium when all the solutes are evenly dispersed ∙ When there are areas of high and low concentration of a solute, a concentration gradient exists. As the molecules found in Collide, there will be a net movement in which direction? From high solute concentration to low ∙ Where does the energy that drives diffusion come from? The motion of molecules ∙ Diffusion differs from active transport in which of the following ways? Diffusion occurs due to random kinetic energy in the molecules 4