Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
11th Edition
ISBN: 9781488687075
Author: Lisa, A. Urry
Publisher: PEARSON
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Chapter 36.2, Problem 2CC
Summary Introduction
To explain: The effect of reduction in the number of aquaporin channels on a plant cell’s capability to adjust according to osmotic conditions.
Concept introduction: Aquaporins are membrane channels, also known as plant proteins, which help in the transportation of water and neutral molecules through the plant cell plasma membranes. Aquaporins have many isoforms that have diverse cellular localizations, transport selectivity, and regulation properties.
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How would a reduction in the number of aquaporinchannels affect a plant cell’s ability to adjust to newosmotic conditions?
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?
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)?
Chapter 36 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
Ch. 36.1 - Why is long-distance transport important for...Ch. 36.1 - Some plants can detect increased levels of light...Ch. 36.1 - WHAT IF? If you prune a plant's shoot tips, what...Ch. 36.2 - If a plant cell immersed in distilled water has a...Ch. 36.2 - Prob. 2CCCh. 36.2 - How would the long-distance transport of water be...Ch. 36.2 - Prob. 4CCCh. 36.3 - Prob. 1CCCh. 36.3 - WHAT IF? Suppose an Arabidopsis mutant lacking...Ch. 36.3 - MAKE CONNECTIONS How are the Casparian strip and...
Ch. 36.4 - Prob. 1CCCh. 36.4 - Prob. 2CCCh. 36.4 - WHAT IF? If you buy cut flowers, why might the...Ch. 36.4 - Prob. 4CCCh. 36.5 - Prob. 1CCCh. 36.5 - Prob. 2CCCh. 36.5 - Prob. 3CCCh. 36.5 - WHAT IF? Apple growers in Japan sometimes make a...Ch. 36.6 - How do plasmodesmata differ from gap junctions?Ch. 36.6 - Prob. 2CCCh. 36.6 - WHAT IF? Suppose plants were genetically modified...Ch. 36 - How did the evolution of xylem and phloem...Ch. 36 - Is xylem sap usually pulled or pushed up the...Ch. 36 - Prob. 36.3CRCh. 36 - Prob. 36.4CRCh. 36 - Prob. 36.5CRCh. 36 - By what mechanisms is symplastic communication...Ch. 36 - Prob. 1TYUCh. 36 - Prob. 2TYUCh. 36 - Prob. 3TYUCh. 36 - Photosynthesis ceases when leaves wilt, mainly...Ch. 36 - Prob. 5TYUCh. 36 - A plant cell with a of -0.65 MPa maintains a...Ch. 36 - Compared with a cell with few aquaporin proteins...Ch. 36 - Prob. 8TYUCh. 36 - EVOLUTION CONNECTION Large brown algae called...Ch. 36 - SCIENTIFIC INQUIRY INTERPRET THE DATA A Minnesota...Ch. 36 - SCIENTIFIC INQUIRY Cotton plants wilt within a few...Ch. 36 - WRITE ABOUT A THEME: ORGANIZATION Natural...Ch. 36 - Prob. 13TYU
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- Contrast water transport mechanisms in plants with those in animals.arrow_forwardWhat is the relationship between osmotic potential and plants when water with salinated water is used to water plants? E.G: How does it inhibit growth and why if the plant isn't salt tolerantarrow_forwardSalinity or salt stress induces the following plant responses except: * A. Induction of osmoregulatory compounds B. Compartmentalization of salt ions in the cytoplasm C. Compartmentalization of salt ions in the central vacuole D. Exclusion of salt ionsarrow_forward
- 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?arrow_forwardWhich one of the following statement is wrong? Options Water is absorbed mainly by unicellular root hairs Cellulosic cell wall is a semi permeable membrane Pure water has maximum diffusic pressure Facilitated diffusion requires special membrane proteinsarrow_forwardName the process by which intact plant cells lose water in the form of droplets from leaf margins.arrow_forward
- If 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_forwardexplain how celluar transport is used to maintain homeostasis in reabsorption of water in the nephron and absorption of water by rootsarrow_forwardThe mangrove is a type of tree that lives along coasts, with its roots growing in highly saline water (water with lots of dissolved salt). Scientists have recently learned that mangroves are able to undergo a process similar to reverse osmosis in the tips of their roots. As a result, the water entering the mangrove's body is significantly less salty than the water surrounding its roots. As opposed to artificial reverse osmosis, which uses pressure generated by pumps to force water through a membrane, the mangrove's "passive" reverse osmosis uses negative pressure generated by water evaporating from the mangrove's leaves to pull fresh water through membrane-like structures in its roots. Technology based on the red mangrove's version of "reverse osmosis" is already being developed, and there is hope it may lead to a much less energy-intensive method of desalination (removing salt from water). Develop a potential explanation as to why it would be advantageous to the mangrove to desalinate…arrow_forward
- The diagram below shows the three pathways for water and ion entry into root cells. Identify which correspond to each image (A, B and C) and give the reasons for such identification. O vacuole cytoplasm cellular wall desmosomes water transport A water transport B water transport Carrow_forwardPlease answer question 26arrow_forwardExplain how solute concentration can affect or influence the amount of water that will enter to and exit from the plant's system through osmosisarrow_forward
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