twice 2. Read each set of directions 3. Complete each activity Data/Analysis: Activity 1: Review Sheet Results 1. Describe two variables that affect the rate of diffusion. Your answer: Increasing the number of membrane carriers and the concentration. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? Your answer: Because Urea was too big to pass through the 20 MWCO membrane 3. Describe the results of the
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Also‚ it will cause the blood vessels to constrict. (LaFave‚ 2003) These effects will work together to increase an animals heart rate. Under normal circumstances‚ the heart rate will increase as more caffeine is added. At some point the high concentration of caffeine will cause the heart to stop functioning. The effect of one outside substance can impair the effects of other substances. In this experiment we will intoxicate an organism. As a result‚ the nervous system will have difficulty responding
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results more accurate. Hypothesis- Their will be a positive correlation between the concentration of caffeine given to the Daphnia and its heart rate. My reason behind this hypothesis is based on the fact that caffeine affects the heart rate of humans‚ as it is a stimulant. From this‚ I can assume that it also affects the heart rate of Daphnia and that the rise in heart rate should reflect the concentration of caffeine. Many scientific studies within the last few years have proven this‚ for
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strongly. The intensity of the color is independent of pH in the range 2 to 9. The complex is very stable and the color intensity does not change appreciably long periods of time. Beer’s law is obeyed‚ over about 1.5-2 orders of magnitude of iron concentration. Beer’s Law is a very simple relationship: A = εbc where A is the absorbance of a substance at a specified wavelength λ‚ in units of nm for light in the
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presented above‚ there are not clear conclusions that can be drawn. In Table 4‚ there is information regarding the effects of varying the concentration of a substrate‚ in this case the pea extract. To view the graphical representation‚ which more clearly displays the relationship‚ view Figure 2. The rate at which the reaction occurred for the 100% concentration is 1.45 mg/dL per minute. For the 50%‚ the rate was 3.05 mg/dL per minute‚ and for the 25%‚ the rate was 2.76 mg/dL per minute. As seen‚ the
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characteristics. By defining these industries I will determine its effects on the other markets in that firm and whether or not other firms can or cannot succeed. If Industry A has twenty firms with a concentration ratio of thirty percent this is known as a monopolistic company with a low concentration. There are many characteristics of this type of industry one example is that it has limited control over the market; this is because there are many buyers and sellers. Another example is a monopolistic
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membrane because Your answer : a. they are not lipid soluble. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down a concentration gradient. 3. Examples of solutes that might require facilitated diffusion include Your answer : a. glucose. Correct answer: d. all of the above. 4. Which of the following would not affect the rate of facilitated diffusion? You correctly answered:
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| 2012 | | Toby Rheinberger Lab Partner: Jeremy Saba | [The Effect of surface area to volume ratio and solute concentration on osmosis.] | The aim of this experiment was to test the effect of surface area on osmosis and the effect of solute concentration on osmosis. To test this aim to hypotheses were devised. 1) If potato pieces are immersed in various salt solutions‚ then the pieces with the greatest surface area to volume ratio will experience the greatest weight change‚ because more
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The absorbance at 260nm (which measures both the oxidized and reduced forms together) was 0.900. The molar extinction coefficient of NADH is 6220 L/mole·cm‚ and the molar extinction coefficient at 260nm is 18‚000 L/mole·cm. Calculate the molar concentrations of oxidized and reduced forms of the nucleotide in the mixed solution. 5. A mixture of ortho‚ meta‚ and para cresoles dissolved in cyclohexane may be analyzed spectrophotometrically because each exhibits an absorption in a region where absorption
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Lab Report Purpose: Osmosis and diffusion through potato core in different concentration (viable) : The concentration of solution in a solution will affect the movement of water across potato cell membrane Material: Potato core Sucrose solution (0.2‚0.4‚0.6‚0.8‚1.0) Electronic Balane Test tube and rack Scalpel Plastic Weighing tray Cork Borers Method: Day 1 use you cork borers to bore 6 vertical hole on your potato. remove the potato cylinders from
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