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Name: Karen BritoExercise 1: Cell Transport Mechanisms and Permeability: Activity 1: Simulating Dialysis (Simple Diffusion) Lab ReportPre-lab Quiz ResultsYou scored 100% by answering 4 out of 4 questions correctly.1. The driving force for diffusion isYou correctly answered: b. the kinetic energy of the molecules in motion.2. In diffusion, molecules moveYou correctly answered: a. from high concentration to low concentration.3. Which of the following dialysis membranes has the largest pore size?You correctly answered: d. 200 MWCO4. Avogadro's number is a constant for the number ofYou correctly answered: b. molecules.02/15/17 page 1
02/15/17 page 2Experiment ResultsPredict Question:Predict Question 1: The molecular weight of urea is 60.07. Do you think urea will diffuse through the 20 MWCO membrane?Your answer : c. No, not at all. Predict Question 2: Recall that glucose is a monosaccharide, albumin is a protein with 607 amino acids, and the averagemolecular weight of a single amino acid is 135 g/mole.Which of the following will be able to diffuse through the 200 MWCO membrane?Your answer : c. glucose only Stop & Think Questions:The reason sodium chloride didn't diffuse left to right is thatYou correctly answered: c. the membrane pore size was too small.Glucose is a six-carbon sugar. Albumin is a protein with 607 amino acids. The average molecular weight of a single aminoacid is 135 g/mole. There is no reason to run these solutes at the 20 MWCO becauseYou correctly answered: d. glucose and albumin are both too large to pass.The rate of diffusion for ureaYou correctly answered: b. is slower than that for sodium because urea is a larger molecule.Experiment Data:SoluteMWCOLeft Solute ConcentrationRight Solute ConcentrationAverage DiffusionRateNa+ Cl-209.000.000.0000Urea200.000.000.0000Albumin200.000.000.0000Glucose200.000.000.0000Na+ Cl-200.000.000.0000Urea209.000.000.0000Albumin200.000.000.0000Glucose200.000.000.0000Na+ Cl-509.000.000.0150Urea500.000.000.0000Albumin500.000.000.0000Glucose500.000.000.0000Na+ Cl-5018.000.000.0273Urea500.000.000.0000Albumin500.000.000.0000Glucose500.000.000.0000Na+ Cl-1009.000.000.0150Urea1000.000.000.0000Albumin1000.000.000.0000Glucose1000.000.000.0000Na+ Cl-1000.000.000.0000Urea1009.000.000.0094
02/15/17 page 4Post-lab Quiz ResultsYou scored 100% by answering 4 out of 4 questions correctly.1. The effect of increasing the concentration of sodium chloride from 9 mMto 18 mMin the left beaker was toYou correctly answered: b. increase the rate of diffusion.