Do Now: How did the concept of passive transport apply to our:

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Presentation transcript:

Do Now: How did the concept of passive transport apply to our: Starch and glucose lab? Red Onion lab?

Announcements Test have been moved to Tuesday Lab Rewrites due Monday End of Term – Oct 30 Please see me if you are missing any work!1!

Cell Labs Review

Will it cross the membrane? Tables Complete Prediction Table (must include a why) Molecule Molecular Formula Will it cross the membrane? Why or why not? Starch polysaccharide Glucose C6H12O6 Iodine I3K Water H2O

Tables Complete Prediction Table (must include a why) Chemical Test Results Water Starch Glucose

Starch solution before being added to iodine

Lugol’s solution (Iodine) – test for starch Water and Iodine Glucose and Iodine Starch and Iodine

Tables Chemical Test Results Indicator Solution Used Distilled Water Starch Glucose Blue colored Benedicts Glucose Indicator Amber-colored Lugol’s Iodine Solution Starch indicator

Summary of Results – Data Table Video of Gluocose/Starch Dialysis Tubing https://www.youtube.com/watch?v=2Th0PuORsWY What was present in the semi-permeable bag at the beginning of the experiment? What was present inside the beaker at the beginning of the experiment? What was present at the end in the beaker?

Osmosis Diffusion Lab Question 1: Question 2: What is moving into bag? What is moving out of bag? Question 2: Provide evidence – DATA!!! What data did you collect? Be specific Question 3: Explain how you know what moved into and out of bag. Use your knowledge of diffusion and osmosis to explain your results. Pore size (size of holes in membrane) Concentration (low, high) – does not have to be specific numbers.

Red Onion Lab Sketches should have Detailed pictures Total Magnification (10X eyepiece, 10X or 40 X objective ) – calculate magnification Description (colors, size, shape, structures)

Red Onion Lab: What process is occurring? Distilled Water Sketch A, C Salt Water Sketch B

Questions 1 &2. Add arrows and concentrations (high/low) to Sketches B and C State whether the cell is in a hypertonic, hypotonic, or isotonic solution. Use your class notes and textbook to make that determination.

Describe why osmosis is a form of diffusion.