Exam 5: Transport of Solutes and Water

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Refer to the figure shown. Refer to the figure shown.   If the figure on the left represents the initial state and the membrane shown in the beakers is permeable only to Na<sup>+</sup>, which manipulation would cause a net negative charge on the left side of the membrane once the system comes to equilibrium? If the figure on the left represents the initial state and the membrane shown in the beakers is permeable only to Na+, which manipulation would cause a net negative charge on the left side of the membrane once the system comes to equilibrium?

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Which statement regarding osmosis is true?

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Briefly describe how the Na+‒K+-ATPase operates.

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Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration). Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration).   If the diagram represents the starting condition, what will occur as the solutions achieve equilibrium? If the diagram represents the starting condition, what will occur as the solutions achieve equilibrium?

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Outward diffusion of a substance from an animal cell increases the concentration of that substance around the outer surface of the cell. If this process continues,

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Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration). Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration).   If a piston moved up because of water movement, could it be physically pushed back down to force water through the membrane? If a piston moved up because of water movement, could it be physically pushed back down to force water through the membrane?

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Which statement regarding channels and transporters is false?

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Transporter proteins on freshwater fish gills transport sodium and chloride

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Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration). Refer to the figure shown. Assume that the two pistons have the same mass and move without friction, the center membrane in the diagram is permeable only to water, and solutes are shaded according to concentration (the darker the shading, the higher the concentration).   The piston on the left would move upward if the membrane were permeable to only _______ and the solution on the left was _______ and the solution on the right was _______. The piston on the left would move upward if the membrane were permeable to only _______ and the solution on the left was _______ and the solution on the right was _______.

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Refer to the figure shown. Refer to the figure shown.   If the beaker on the left represents the initial state and the membrane shown in the beakers is permeable to K<sup>+</sup> and Na<sup>+</sup>, If the beaker on the left represents the initial state and the membrane shown in the beakers is permeable to K+ and Na+,

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Refer to the figure shown. Refer to the figure shown.   Which of the panels in the figure represents passive diffusion? Which of the panels in the figure represents passive diffusion?

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Discuss the electrochemical equilibrium of Cl‒ across a typical animal cell.

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In the animal cell, the overall electrical effects on Cl‒ diffusion cause Cl‒ to _______ the cell.

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In what way does facilitated diffusion resemble simple diffusion as well as active transport?

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Outward diffusion of a substance from an animal cell increases the concentration of that substance around the outer surface of the cell. This surface is called the

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Discuss how a boundary layer forms outside of a cell and how it can impede further diffusion.

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The passive transport of water across a membrane is called

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Choose the situation that would generate the greatest amount of hydrostatic pressure.

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Most terrestrial vertebrates typically have internal fluids of approximately

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Refer to the figure shown. Refer to the figure shown.   In which panel do the channels open and close based on chemical bonding? In which panel do the channels open and close based on chemical bonding?

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