Question;CellMembraneTransport;Hands-OnLabs,Inc.Version42-0034-00-01;Lab Report;Assistant;Thisdocumentisnotmeanttobeasubstitute foraformallaboratoryreport.TheLabReport Assistantissimplyasummaryoftheexperiment?squestions,diagramsifneeded,anddatatables;that;shouldbeaddressedinaformallabreport.;Theintentistofacilitatestudents?writing;oflab reports by providing;this informationin an editable;filewhich can be sent to an instructor.;Exercise1:DiffusionthroughanArtificialMembrane;Observations;Data;Table 1: Changes During Dialysis;Color;Before Dialysis;AfterDialysis;Solutionin cup 1;Solutionin dialysis;tubing;Data;Table 2: Benedict?s;Reagent Results;Color of;Solution;Before Heating;AfterHeating;IKI;solutionin cup 1;Solutionin dialysis;bag in cup 2;Distilled;water;Questions;A. What;is the purpose of this exercise?;What is being tested?;B. What color change did you;observe in the dialysis tubing? What does that change indicate? C.;Was;there a color change in the water surrounding;the tubing? If so, explain.;D. WhatcolorchangedidyouobserveinthewatercontainingtheIKIafterheating?Whatdoes that;change indicate?;E. What does the Benedict?s reagent;detect?;F. What does the IKI solutiondetect?;G. In what;way;is a cell membrane similar to the model cell made of dialysis tubing? H. Is the transport mechanism in the model cell passive or active?Why?;Exercise;2: Diffusionat differenttemperatures;Observations;Data;Table 3: Diffusionof KMnO4at Various Temperatures and Times;Temperature inside cup;Colorof Water;0min;5min;Questions;I. How;does temperature affectthe;rate of diffusion?;J. State a general hypothesis;to cover;how temperature;affectsrate;of diffusion;Exercise 3: Tonicity;and Diffusion;Observations;Data;Table 4: Potato;Dimensions.;Potato;BeforeOsmosis;(L? W);cm;AfterOsmosis;(L? W);cm;Tonicity;Hypertonic, Isotonic, or;Hypotonic;Distilled;water;10%;Sodium Chloride;Questions;A. Whatistheconditionofeachpotatostripaftersoakinginthetesttubesforanhour?Which;one is limp and which one is crisp?;B. Howwouldyou explainthedifferenceintheconditionsofthepotatostripsusingtheconcept of tonicity?;C. What was the tonicity of the fresh water;solutionwith respect to the potato;cells? D. What was the tonicity of the salt water;solutionwith respect to the potato;cells?;E. How;do the changes in the conditions;of the potato strips;relate to;the wiltingof plants?;F. How does keeping;vegetables;cool slow them from wilting?
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