Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 39.2, Problem 1CC
Describe the direction of water movement when a cell of each of the three types is placed into a solution of pure water (whose water potential, ψw, is defined as 0 MPa).
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Consider a cell whose tonicity is primarily
determined by cytoplasmic (interior)
concentrations of 1.0 M NaCl and 0.5 M
CaCl2. Determine the direction of water
flow if the cell were placed into the
following solutions:
Answer
2.5 M glucose solution
¦ Answer
1.0 M CaCl 2 solution
¦ Answer
1.75 M NaCl solution
⠀⠀ Into the cell
⠀⠀ Out of the cell
Neither into nor out of the cell
What 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.
The beaker is divided into two compartments (C and D) that has equal volumes of solution separated by an artificial membrane that has a pore size of 23 Å (Angstrom). Explain the movement of solute after eight hours if comparment C has 17 % sucrose while the compartment D has 2 % sucrose (diameter of sucrose molecule = 9 Å (Angstrom))
Chapter 39 Solutions
Biology
Ch. 39.2 - Describe the direction of water movement when a...Ch. 39.3 - Prob. 1CSCh. 39.4 - Prob. 1CSCh. 39.4 - Prob. 1CCCh. 39.4 - Prob. 2CCCh. 39.4 - Prob. 3CCCh. 39.4 - Prob. 4CCCh. 39.4 - Prob. 5CCCh. 39.4 - Prob. 1EQCh. 39.4 - Prob. 2EQ
Ch. 39.4 - Prob. 6CCCh. 39.4 - Core Skill: Connections Look back to Figure 36.16,...Ch. 39 - Prob. 1TYCh. 39 - Prob. 2TYCh. 39 - Prob. 3TYCh. 39 - Prob. 4TYCh. 39 - Prob. 5TYCh. 39 - Which of the following statements best explains...Ch. 39 - What features of water explain how it can be drawn...Ch. 39 - Prob. 8TYCh. 39 - Prob. 9TYCh. 39 - Prob. 10TYCh. 39 - Prob. 1CQCh. 39 - Prob. 2CQCh. 39 - Prob. 3CQCh. 39 - Prob. 1COQCh. 39 - Prob. 2COQ
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- Assume that a beaker is divided in half by a membrane which is permeable to water only. A 0.45 M glucose solution is on one side of the membrane, and a 0.40 M NaCl solution is on the other side of the membrane. Indicate which direction would water move. Explain why the movement occurs in that direction.arrow_forwardWhat is meant by concentration gradient? Is it correct to refer to “concentration gradient of water”?arrow_forwardin what concentration gradient do water molecules move faster in? would the water molecules move faster when there is a high concentration gradient?arrow_forward
- compare and contrast between hypertonic, isotonic and hypotonic solutions and include an image that correctly represents each of these possible cellular tonicities illustrating the movement of water.arrow_forwardCreate a diagram that demonstrates the difference between tonicity and osmolarity. Be sure to label the new solutions in each condition, draw the changes (if predicted) in cell shape/volume, and use arrows to show the movement of water relative to the cell. Please start with a red blood cell in an isosmotic solution and show what happens to cell shape and water movement when NaCl is added to the solution, or when water is added.arrow_forwardAssume that a beaker is divided in half by a membrane which is permeable to water only. A 0.45 M glucose solution is on one side of the membrane, and a 0.40 M NaCl solution is on the other side of the membrane. (a) Diagram the above set-up, (b) indicate with an arrow the direction of water movement across the membrane and (c) explain, specifically, why the movement occurs in that directionarrow_forward
- When two chambers are separated by a membrane permeable to water but not solute, if water is free to move in either direction without limitation or pressure, then water will move until the concentration of solute on both sides of the chamber is equal move until there is no water on the dilute side move until there is no water on the concentrated side move until the concentration of water on both sides of the chamber is equalarrow_forwardA red blood cell with an intracellular fluid (ICF) concentration of 280 mmol/L, is placed into an environment were the concentration of the extracellular fluid (ECF) is 305 mmol/L. As a result, water will move across the cell/plasma membrane. a) Name the process by which water moves b) Describe the overall direction of movement of the water. Answer choices: (i) From outside the cell to inside the cell (ii) From inside the cell to outside the cell, or (iii) Equally, into and out of the cell iii Explain your reasoning for your answer to part (c). 1In your answer you must describe the environment on both sides of the membrane, and use 3 of the following 4 terms correctly; hypertonic, hypotonic, lower solute concentration, higher solute concentrationn (2pts -Correct use of biological terminology, and correct spelling is essential. Edit View Insert Format Tools Table 12pt v Paragraph BIUA ...arrow_forwardPlease order the following types of solute diffusivity from largest to smallest. 1. D pore: Diffusivity of solute in a pore 2.De: Effective diffusivity of solute through a heterogeneous membrane material 3. D AB: Diffusivity of solute in water 4. D mi Diffusivity of solute through a membrane pore relative to the bulk concentrationarrow_forward
- 1. Consider a cell with surface area 2.5 x 102 mm, initial water potential of -0.3MPA and membrane hydraulic conductance of 10 m s MPa". The cell is placed in freshwater having a solute potential of -0.15 MPa. (a) Calculate the driving force for water movement into the cell. (b) Determine the initial flow rate of water into the cell in volumetric terms.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_forwardA8.arrow_forward
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