Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What can happen to animal cells when placed in a hypotonic solution? Explain.
Transcribed Image Text:**Osmosis and Solutions: An Educational Overview**
**U-tube Diagram:**
- **Before Osmosis:** The U-tube contains two sides separated by a selectively permeable membrane. One side shows a higher concentration of sugar molecules (black dots) mixed with water molecules (white dots), while the other side mainly contains water molecules.
- **After Osmosis:** Water molecules move across the membrane to the side with more sugar molecules. This demonstrates the process of osmosis, highlighting the movement of water from an area of lower solute concentration to an area of higher solute concentration.
**Membrane Details:**
A close-up inset diagram shows the selectively permeable membrane, which allows only water molecules to pass through while blocking sugar molecules.
**Cell Solutions:**
1. **Cell in Isotonic Solution:**
- Water molecules (represented as dots) move in and out of the cell at the same rate.
- This maintains cell size as there is no net movement of water.
2. **Cell in Hypotonic Solution:**
- The solution outside the cell has a lower concentration of dissolved particles.
- Water enters the cell by osmosis, causing the cell to swell.
3. **Cell in Hypertonic Solution:**
- The solution outside the cell has a higher concentration of dissolved particles.
- Water leaves the cell by osmosis, causing the cell to shrink.
**Instructions:**
Refer to the U-tube and cell diagrams above to answer related questions regarding osmosis and the effects of different solutions on cells.
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