Answer in easy short sentences

Extension Questions 19. Using the concept of osmosis, explain why water is sprayed over produce in a grocery store. How e, and why would this change be desirable? might this change the appearance of the produce, and 20. Suppose you made a lettuce salad in the afternoon, added salt and other seasonings, and then put the salad in the refrigerator. When you took the salad out of the refrigerator for dinner, the let- tuce looked wilted and some water was in the bottom of the bowl. Use the principles of osmosis to explain what happened. 21. In extreme cases, it is possible to die from drinking too much water. The consumption of several liters of water in a short amount of time can lead to brain edema (swelling) and death. Explain the effect of ingesting an extremely large amount of water at the level of the brain cells, including the role of osmosis in this process. 22. The diagram below shows a single-celled organism called Paramecium, which lives in freshwater environments. This organism contains a specialized organelle called a contractile vacuole that helps maintain osmotic balance. Predict how this organelle might help the organism survive given that it is constantly immersed in a hypotonic solution. Food Vacuoles Radiating Canal Contractile Vacuole Nucleus Oral Groove Vestible Oesophagus Cilia 6 POGIL Activities for High School Biology