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 34.1, Problem 1SB
Summary Introduction
To review:
The water potential and its importance in plant cells.
Introduction:
Water potential describes how water molecules freely move in a particular environment or system. It is denoted by kilopascals (kPa) or psi (ѱ). The value of water potential always remains negative but it has a maximum value of 0, which is considered as the purest form.
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There are two types of osmotically active solutes in plants.What are compatible solutes and Where are they typically located? Where do ions from inorganic salts accumulate?
The water potential of three adjacent plant cells are as follows:
X 0kPa
Y -1000kPa
Z -4000kPa
In which direction will water move?
1) A plant cell with a pressure potential of 5 bars and an osmotic potential of -9 bars is in equilibrium with a surrounding solution that is open to the air. What is the water potential of the surrounding solution?
2) A plant cell, when initially placed in pure water, has an osmotic potential of -4 bars and a pressure potential of +2 bars.
a) Which way will water diffuse?
b) When will net diffusion stop?
c) When equilibrium is reached, what are the cell's osmotic potential and pressure potential values?
Chapter 34 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 34.1 - Prob. 1SBCh. 34.1 - Prob. 2SBCh. 34.1 - Explain how the apoplastic, symplastic, and...Ch. 34.2 - Prob. 1SBCh. 34.2 - Prob. 2SBCh. 34.3 - Prob. 1SBCh. 34.3 - Prob. 2SBCh. 34.3 - Prob. 3SBCh. 34.4 - Prob. 1SBCh. 34.4 - Prob. 2SB
Ch. 34.5 - Compare and contrast translocation and...Ch. 34.5 - Prob. 2SBCh. 34 - Prob. 1TYKCh. 34 - Prob. 2TYKCh. 34 - Prob. 3TYKCh. 34 - Prob. 4TYKCh. 34 - Prob. 5TYKCh. 34 - Prob. 6TYKCh. 34 - Prob. 7TYKCh. 34 - Prob. 8TYKCh. 34 - An indoor gardener leaving for vacation completely...Ch. 34 - Prob. 10TYKCh. 34 - Prob. 11TYKCh. 34 - Prob. 12TYKCh. 34 - Discuss Concepts Concerns about global climate...Ch. 34 - Prob. 14TYKCh. 34 - Apply Evolutionary Thinking A variety of...Ch. 34 - Prob. 1ITDCh. 34 - Prob. 2ITDCh. 34 - Prob. 3ITD
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- Explain what would happen if a plant cell was placed in a hypotonic environment and why (be sure to include solute concentrations, water movement and turgor pressure in your explanation)?arrow_forwardWhat is the wall resistance of plant cells? Does this resistance facilitate or make difficult the entrance of water into the cell?arrow_forwardThe osmotic potential of the plant cell is -0.1 MPa and it is placed in an 9 mM sorbitol solution (21 °C). Calculate the turgor pressure of the cell when the water potential of the cell has equilibrated to the same as that of the solution.arrow_forward
- What would enhance water uptake by a plant cell?(A) decreasing the Ψ of the surrounding solution(B) positive pressure on the surrounding solution(C) the loss of solutes from the cell(D) increasing the Ψ of the cytoplasmarrow_forwardWhen leaf water potential increases why does hydraulic conductivity increase as well in plants?arrow_forwardCorrelate cohesion and tensile strength properties of water and how would this contribute to water movement in plants? *arrow_forward
- If you place a flaccid plant cell with ΨS = -0.4 MPa in pure water, which of the following will occur? A. Water will not enter the cell because the flaccid cell has solutes and low water potential. B. Water enters the cell because the flaccid cell has solutes and low water potential. C. Water enters the cell because the flaccid cell has solutes and high water potential. D. Water will not enter the cell because the flaccid cell has solutes and high water potential.arrow_forwardWhat are some other biological examples of solutes affecting water potential and therefore movement of water in a living organism? Find examples in both plant and animal.arrow_forwardYou have an intact flaccid cell with a solute potential of -1.22MPa, you dropped the cell in a solution of 4M concentration at 20°C. a) In which direction water will flow? Why? b) At equilibrium, what will be the cell and solution: a. Water potential b. Osmotic potential c. Pressure potentialarrow_forward
- What prevents plant cells from bursting when they are placed in hypotonic surroundings?arrow_forwardWhat does the evaporation of water molecule from the cell of leaf creates?arrow_forwardFrom a plant physiological perspective, what is the difference between chilling and freezing? How can freezing lead to mechanical damage of tissue and individual cells?arrow_forward
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