Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 8TYU
SCIENCE, TECHNOLOGY, AND SOCIETY
Extensive irrigation in arid regions causes salts to accumulate in the soil. (When water evaporates, salts that were dissolved in the water are left behind in the soil.) Based on what you have learned about water balance in plant cells, explain why increased soil salinity (saltiness) might be harmful to crops.
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1. Channel proteins used for the bulk passage of water molecules across the cell membrane?2. The tonicity of the extracellular fluid that maintains the turgid appearance of plant cells?3. The tonicity of the extracellular environment causing plasmolysis of plant cells?4. Plant cells are said to be flaccid in this type of cellular environment or solution?
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Questions
1. A) If the potato cells were hypotonic to the surrounding solution, the surrounding solution itself
would be what to the potato cells (hypertonic, hypotonic, or isotonic)?
B) Were the potato cells submerged in water with no salt hypertonic, hypotonic, or isotonic to the
surrounding environment?
C) Were the potato cells submerged in 5 g/100mL salt solution hypertonic, hypotonic, or isotonic to
the surrounding environment?
D) Look at your graph. At approximately what concentration of salt solution would the potato cells
have likely been isotonic with the surrounding solution? [Tip: Estimate approximately at what
concentration there would have been no change in the average length of potato strips.]
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A plant cell has a 5% percent salt concentration. It is placed into a solution
containing a 12% percent salt concentration. What will happen to the plant
cell?*
Water will move out of the plant cell, causing it to shrivel.
Water will move into the plant cell, causing it to swell and burst.
Water will move into the plant cell, causing it to shrivel.
Water will move out of the plant cell, causing it to swell and burst.
Chapter 5 Solutions
Campbell Biology in Focus
Ch. 5.1 - Plasma membrane proteins have carbohydrates...Ch. 5.1 - WHAT IF? How would the membrane lipid composition...Ch. 5.2 - What property allows O2 and CO2, to cross a lipid...Ch. 5.2 - Why is a transport protein needed to move many...Ch. 5.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 5.3 - How do you think a cell performing cellular...Ch. 5.3 - WHAT IF? If a Paramecium caudatum cell swims from...Ch. 5.4 - Sodium-potassium pumps help nerve cells establish...Ch. 5.4 - Prob. 2CCCh. 5.4 - MAKE CONNECTIONS Review the characteristics of the...
Ch. 5.5 - As a cell grows, its plasma membrane expands. Does...Ch. 5.5 - Prob. 2CCCh. 5.5 - MAKE CONNECTIONS In Concept 4.7, you learned that...Ch. 5.6 - During an epinephrine-initiated signal in liver...Ch. 5.6 - When a signal transduction pathway involves a...Ch. 5.6 - WHAT IF? How can a target cells response to a...Ch. 5 - In what way do the membranes of a eukaryotic cell...Ch. 5 - Which of the following factors would tend to...Ch. 5 - Phosphorylation cascades involving a series of...Ch. 5 - Lipid-soluble signaling molecules, such as...Ch. 5 - Which of the following processes includes all the...Ch. 5 - Based on Figure 5.17.which of these experimental...Ch. 5 - Prob. 7TYUCh. 5 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 5 - FOCUS ON EVOLUTION Paramecium and other...Ch. 5 - FOCUS ON INTERACTIONS A human pancreatic cell...Ch. 5 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- SOLUTE EGG WATER MEMBRANE Figure 1. Consider figure 1. Predict how water will move across the membrane. Water will move into the cell to where there is a higher solute concentration. Water will move out of the cell to where there is a lower solute concentration. Water will move into the cell to where there is a lower solute concentration. The cell and solution are in equilibrium, so water will move both directions equally. 76 F Partly sunny arch O O O Oarrow_forwardIn the process of exocytosis, vesicles coming from the inside of the cell fuse with the plasma membrane which travels across the membrane to be released outside the cell. This type of transport usually applies to enzymes and hormones. Can you cite an Texample in plants where this form of transport is beneficial? How about in animals?arrow_forwardIf placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference? the relative inelasticity and strength of the plant cell wall the relative impermeability of the plant cell membrane to water the relative impermeability of the plant cell wall to water expulsion of water by the plant cell's central vacuolearrow_forward
- Osmosis is the diffusion of water, and can be driven by many different factors, including temperature, pressure, the nature of the location, and solute concentration. Which of these is a requirement for osmosis to occur? Water must flow from low to high water potential. Only within plant cells is pressure required. Temperature must be above 30 C. There must be a semipermeable membrane.arrow_forwardThe following diagram shows the effect of osmotic concentration on a plant cell. Using the terms isotonic, hypertonic and hypotonic identify what is happening in each cell and state what each term means and which cell it applies to. Plant cells cell wall -nucleus cell membrane -central vacuole -chloroplast Paragraph B I U v A !!! liliarrow_forwardThe membrane in the diagram above is not permeable to the sugar in the solution, however it is permeable to water. Which of the following statements would best describe what will happen? Select ALL that apply. [mark all correct answers]a. Sugar molecules will move to side A until the concentrations on both sides are equal.b. There will be no change since the membrane is not permeable to the sugar molecules.c. Sugar molecules will move to side A at the same rate as the water molecules will move to side B.d. Water molecules will move to side B until the concentrations on both sides are equal.arrow_forward
- A certain seaweed plant is found in estuaries. At high tide, the plant is exposed to sea water; at low tide, the plant is exposed to brackish water (less salty water). The concentrations of some dissolved materials remain virtually constant in the cells of the seaweed.arrow_forwardMany fruits can be preserved by candying. The fruit isimmersed in a highly concentrated sugar solution, and thenthe sugar is allowed to crystallize. How does the sugarpreserve the fruit? (Osmosis is a very common phenomenon with fruits)arrow_forwardThe plant wall allows for plant cells to swell under large internal pressure, what membrane lined passage allows for rapid movement of polar molecules between cells?arrow_forward
- "In a beaker containing 6% NaCl, you place a cell which contains 0.9% NaCl. NaCl doesn t cross the membrane. What will be the result?" There will be net movement of water out of the cell There will be net movement of water into the cell There will be net movement of salt out of the cell There will be net movement of salt into the cellarrow_forwardA plant cell placed into a hypotonic environment will: Lyse Will “puff up” and swell but not lyse Go through plasmolysis Remain at the same osmotic pressurearrow_forwardA wilted flower placed in a vase of fresh hwater for several hours became stiff and stood erect. When it was placed in a salt solution, it wilted. From this information, which of the following statements BEST describes the cells of the flower? Group of answer choices hypotonic to both freshwater and the salt solution hypertonic to freshwater but hypotonic to the salt solution hypertonic to both the freshwater and the salt solution hypotonic to freshwater but hypertonic to the salt solutionarrow_forward
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