Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Question

Does osmosis occur if a cell is placed in an isotonic solution?

**Osmosis and Solutions: A Visual Guide** **U-tube Illustration:** - **Before Osmosis:** - The U-tube is divided by a selectively permeable membrane. On both sides of the U-tube, there are water molecules (small dots) and sugar molecules (larger dots). - Water molecules are randomly dispersed, and sugar molecules are more concentrated on the right side. - **After Osmosis:** - Water has moved from the left to the right side, diluting the concentration of sugar molecules on the right. - The water level is higher on the right side due to osmosis. **Diagrams on Types of Solutions:** - **Cell in Isotonic Solution:** - Contains equal concentration of water molecules inside and outside the cell. - Water molecules move in and out of the cell at the same rate (indicated by bidirectional arrows). - No net change in cell size. - **Cell in Hypotonic Solution:** - Higher concentration of water molecules outside the cell. - Water enters the cell by osmosis (indicated by arrows pointing inward). - Causes the cell to swell. - **Cell in Hypertonic Solution:** - Higher concentration of dissolved particles outside the cell, leading to a lower concentration of water outside. - Water leaves the cell by osmosis (indicated by arrows pointing outward). - Causes the cell to shrink. **Summary:** This visual guide illustrates how osmosis affects cells in various solutions, demonstrating water movement across selectively permeable membranes in isotonic, hypotonic, and hypertonic conditions. Refer to the U-tube pictures when answering related questions.
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Transcribed Image Text:**Osmosis and Solutions: A Visual Guide** **U-tube Illustration:** - **Before Osmosis:** - The U-tube is divided by a selectively permeable membrane. On both sides of the U-tube, there are water molecules (small dots) and sugar molecules (larger dots). - Water molecules are randomly dispersed, and sugar molecules are more concentrated on the right side. - **After Osmosis:** - Water has moved from the left to the right side, diluting the concentration of sugar molecules on the right. - The water level is higher on the right side due to osmosis. **Diagrams on Types of Solutions:** - **Cell in Isotonic Solution:** - Contains equal concentration of water molecules inside and outside the cell. - Water molecules move in and out of the cell at the same rate (indicated by bidirectional arrows). - No net change in cell size. - **Cell in Hypotonic Solution:** - Higher concentration of water molecules outside the cell. - Water enters the cell by osmosis (indicated by arrows pointing inward). - Causes the cell to swell. - **Cell in Hypertonic Solution:** - Higher concentration of dissolved particles outside the cell, leading to a lower concentration of water outside. - Water leaves the cell by osmosis (indicated by arrows pointing outward). - Causes the cell to shrink. **Summary:** This visual guide illustrates how osmosis affects cells in various solutions, demonstrating water movement across selectively permeable membranes in isotonic, hypotonic, and hypertonic conditions. Refer to the U-tube pictures when answering related questions.
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