1. Using the figure below of a cell in an aqueous solution, draw an arrow that represents the net direction of the movement of water molecules across the plasma membrane, into the cell or out of the cell? Cell Exterior Cell Interior Plasma Membrane = Solute Molecules (the number of green dots represents relative concentration of solute molecules inside and outside the cell.) 2. Is the cell in question 1 above in a hypertonic, hypotonic, or isotonic solution?

1. Using the figure below of a cell in an aqueous solution, draw an arrow that represents the net direction of the movement of water molecules across the plasma membrane, into the cell or out of the cell? Cell Exterior Cell Interior Plasma Membrane = Solute Molecules (the number of green dots represents relative concentration of solute molecules inside and outside the cell.) 2. Is the cell in question 1 above in a hypertonic, hypotonic, or isotonic solution?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 9TYK: Which of the following statements is true for the figure in question 8? a. The net movement of...

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10. What is osmosis? Is it correct to call it the diffusion of water across a membrane permeable only to the solvent, (water), and impermeable to the solutes? Define and understand the terms: isotonic, hypotonic, hypertonic. What are the these conditions on cells with or without cell walls? consequences of
3. The diagram to the right depicts a cell submerged in a solution. The cell membrane is permeable to water but not to sugar. Start by completing the % concentrations of water of the intracellular and extracellular solutions. a) What is the cytosol in this example? (circle the correct term below) hypotonic hypertonic isotonic b) How do you know? 30% Sugar % Water d) Predict: What is going to happen to the size(mass) of the cell? 60% Sugar % Water c) Because the solutions are not isotonic, osmosis is going to occur. In what direction is water going to move? e) Predict: What is going to happen to the extracellular solute concentration?
18.. Use the following diagram to answer the questions. Assume the membrane is semipermeable to glucose, water, and iodine (IKI). A. Which solutes will diffuse into the cell? B. Which solute will diffuse out of the cell? 10% glucose 40% glucose C. Which solute will not diffuse at all? 20% starch 0% starch D. What type of solution (the outside of the cell - hypertonic, isotonic or hypotonic) does the diagram represent? 70% water 50% water 10% IKI E. What color will the cell be at the conclusion of this experiment? What color will the solution in the beaker be? Justify your answer,
7. Label the following diagrams of Red Blood Cells and Plant Cells as being examples of cells contained in Isotonic, Hypertonic and Hypotonic solutions. H,0 H,0 H,0 H,0 H,0 H,0 H,0 H,0
1. in what direction water flows by osmosis through a semipermeable membrane when placed in a hypotonic solution, isotonic, or hypertonic environment? 2. Animal Cells burst or lyse in an environment?
4. In this cartoon, imagine that Romeo is a potassium ion (K+) and Juliet is a sodium ion (Na+). Explain why they're stuck on their own sides of the membrane and what they need to get through it. The Paramecium Parler Wherefore art thou, Ramea?! Star-crossed solutes I'm stuck behind this semipermeable membrane! Ambe Sites
6. A carrot, when dried out, becomes soft. There is a way to make it firm and crisp. Explain how and why, using the following guidelines. a) Draw and label a representative cell of the carrot, in its dried state. Be precise in your drawing. b)Describe the type of extracellular solution that is appropriate to add to make the desired change (name and define what type of solution, the net movements of solvent and solutes, etc.). c)Draw a representative cell of the carrot, in its possible state after the change. Represent the movement of water using an arrow to indicate what has happened.
2. Two different aqueous solutions are placed in equal size chambers on either side of a semipermeable membrane as shown. The membrane is impermeable to the particles but permeable to water. Which of the following will occur? Semipermeable membrane Particle X particle Y SOLUTION1 SOLUTION 2 a. No net movement of water or solutes will occur. b. One molecule of particle Y will move to solution 1. c. Osmosis will cause water to exit solution 1. d. Water will leave solution 2 and enter solution 1.
8. Phosphate buffered saline (PBS) is often used as an isotonic solution to keep cells happy and alive. Though recipes vary, PBS typically contains 157 mM Na* and 4.5 mM K+, yet inside of the cell that ratio is switched (there is approximately 150 mM K* and only about 10 mM Nat). Why is PBS still considered isotonic? That is, why does putting cells into PBS not create a lot of osmotic pressure?
4. Complete the table below to show the differences between active and passive transport. Requires energy input by the cell Molecules move along (down) a concentration gradient Moves Molecules against (up) a concentration gradient Always involves membrane-spanning proteins Molecules pass between the phospholipids Moves ions like Na* and K+ Facilitated Diffusion Passive Diffusion (Passive Transport) x x Active Transport ✓
4. The graph below represents two different modes of transport across a biological membrane. One employs a membrane protein and the other does not. Which line represents transport with a membrane protein? Label each line with the mode of transport. There are three key characteristics of transport across a biological membrane using a membrane protein. What are these three key features? List and describe each feature. 107 A B Concentration difference across the mebrane Rate of Transport
1. What effect does increasing temperature have on the rate of diffusion? 2. Why must a membrane be "semi-permeable" in order for osmosis to occur? 3. What will happen to the shape and appearance of leaf cells if they are placed in a high salt (hypertonic) solution? Why?