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Name: __________________________________ Per. _____ Date: ______________________ Potato Plant Cell Turgor Lab Data Table: Solution A B C D Initial Mass (g) Final Percent Initial Mass (g) Change in flexibility mass (flaccid or crisp) E F Final flexibility (flaccid or crisp) Final volume of water in beaker (mL) Calculate the Percent Change in mass in (column C) for each of the three potato slices using the following formula: Final mass – Initial mass x 100 Initial Mass Predictions: Complete the following table for predictions and explanations. Potato Mass Flexibility Explanation Environment Increase Increase Air Or Decrease Or Decrease Distilled water Increase Or Decrease Increase Or Decrease Saline (salt) water Increase Or Decrease Increase Or Decrease Plant Cell Diagram: Refer to page 74 in the Biology textbook to assist in labeling the figure of a typical plant cell below. Name: _________________________________ Per. _____ Date: ____________ Post Lab Analysis Questions: 1. Define “Turgor pressure” - __________________________________________ __________________________________________________________________ 2. Explain what is happening when a plant “wilts”. __________________________________________________________________ __________________________________________________________________ 3. What does the amount of flexibility and bend of the potato slice tell you about the turgor pressure inside the potato cells? __________________________________________________________________ __________________________________________________________________ 4. What effect did the salt have on the potato cells and the turgor pressure? __________________________________________________________________ __________________________________________________________________ 5. What effect did the distilled water have on the potato cells and turgor pressure? __________________________________________________________________ __________________________________________________________________ 6. Which solution caused greater turgor pressure within the potato cells? __________________________________________________________________ 7. Was the any change in mass or turgor pressure in the potato slice that remained out of solution in the air? Identify any changes and explain why those changes occurred or why there was no change. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 8. Did water move into or out of the potato cells when soaked in distilled water? Explain why you think this occurred. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 9. Did water move into or out of the potato cells when soaked in salt water? Explain why you think this occurred. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 10.What might a plant and its cells do to maintain and regulate turgor pressure in ever changing environmental conditions? (Hint: think about osmosis direction) __________________________________________________________________ __________________________________________________________________ __________________________________________________________________