Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 34, Problem 3TYK
Summary Introduction

Introduction:

The turgor pressure influences the movement of solutes and water throughout the cell and plant body. It contributes to the turgidity of the cell. The osmotic flow of water across influences the turgor pressure in the plant cells and also maintains the structure of the plant cell.

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Which of the following is true of the water potential of a healthy living plant cell? ( SELECT ALL THAT APPLY)  A. It has a higher solute potential (lower solute concentration) than the extracellular environment     B. It is under negative pressure     C. It has a lower solute potential (high solute concentration) than the extracellular enviroment     D. It is under positive pressure     E. It has a pressure potential equal to zero
Consider a plant cell. The value for solute concentration in a plant cell is -0.12 MPa and the turgor pressure is 0.12 MPa. 1- What is the water potential in this plant cell? 2- If this plant cell were placed in a solution with water potential of -0.1 MPa, what would happen to the cell? (Hint: explain where the water goes and what that does to the cell).
Increasing the concentration of solutes increases osmotic potential, hence water potential decreases. A. Agree, because presence of solutes increses osmotic pressure and thus osmotic potential. C. Agree, because they just represent the same values. D. Disagree, because it is the decrease in water pressure that decreases osmotic potential. B. Disagree, because presence of solutes increases osmotic pressure which decreases osmotic potential.
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