Activity 1: Stimulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: • The composition of the lipid layer‚ this content varies from tissue to tissue. For example kidney tissues have a high cholesterol content which makes them impermeable to water. • The size of the molecule‚ the larger the molecule the slower the rate of diffusion. 2. Why do you think the urea was not able to diffuse
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sucrose. The membrane is not permeable to the sugar molecules. Indicate which side is initially hypertonic and which is hypotonic. Show‚ using an arrow‚ the direction of osmosis. 4. Red blood cells are placed in three beakers containing the following solutions: Beaker distilled water‚ Beaker B – isotonic solution‚ Beaker
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The Effect Salt Water Has On Radish Plant Growth By: Collins Azubuike
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1. Substances soluble in fat: fatty acid‚ glycerol‚ some vitamins (A‚D‚E‚K) 2. Neutral particles: water‚ oxygen‚ carbon dioxide‚ Example of Diffusion Between alveoli and blood capillaries in the lung during gases exchange. OSMOSIS What is Osmosis? Osmosis is the diffusion of a water through a semi-permeable membrane‚ from a solution of low solute concentration to a solution with high solute concentration. It is a physical process in which a solvent moves‚ without input of energy‚
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Week 2 Worksheet – Chapters 3‚ 4‚ and 5 ACROSS 1 The movement of a substance from one place to another due to the substance’s kinetic energy. Diffusion 3 The smallest living structural and functional unit that is enclosed by a membrane. Cell 6 The point at which a substance becomes evenly distributed throughout the solution and the concentration gradient disappears. equilibrium 7 One cell or a group of highly specialized epithelial cells that secrete substances into ducts‚ onto
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their opinions of the policy among others. Faculty was interviewed on their thoughts and how the policy helped with the classroom. Administration helped with the reasoning behind implementing the policy and some hints to phase outs of the computer labs located in the college of business. We found that students believed that the policy is not effective‚ but should be enforced. For faculty‚ some believe that the policy is helpful for learning and welcome laptops in the classroom while others feel
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The results provide evidence that when there was an increase in the sodium chloride concentration the mass of the potato prisms declined. At the zero percent concentration there was an increase of mass by 1.75%‚ from there the 1%‚ 3%‚ 5% and 10% begun on a downward trend with the percentage change in mass declining. The graph was on a steady decline from 0% being the highest point with a change of mass of 1.75% finishing with the 10% solution on a decline of -12.28%. From observing the scatter plot
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the process by which organisms balance water‚ or solvent‚ concentrations with salt‚ or solute‚ concentrations in tissues and cells (Campbell). Organisms must perform this process of regulation because of the “Fick’s Law of Diffusion”‚ also called osmosis‚ which states that‚ “The flow of solvent from a solution of lower solute concentration to one of higher solute concentration” will occur. This means that in an organism water will cross a semi-permeable layer‚ tissues in cell walls in this case‚ from
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you be able to observe any diffusion? NO there is no diffusion taking place 5. Does being unable to observe diffusion necessarily mean that diffusion is not taking place? yes you should be able to tell when equilibrium is reached Osmosis Activity 4: Osmosis 1. Did you observe any pressure changes during the experiment? If so‚ in which beaker(s)‚ and with which membranes? Yes in the left beaker at the membrane 20 2. Why? 3. Did the Na+/Cl- diffuse from the left beaker to the right
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ACTIVITY ONE- Cell Transport Mechanisms and Permeability: Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. Molecular weight affects the rate of diffusion because the bigger the size of the molecule the longer it will take to diffuse. Membrane size is another variable that affects the rate of diffusion because if the membrane’s pores are small it will take molecules longer to diffuse though it than if the pores were larger. Also‚ membrane thickness
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