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Questions and Answers
What is the driving force for diffusion down a concentration gradient?
According to Fick's Laws, what factor contributes to a slower rate of diffusion?
In the context of osmosis, what diffuses down its concentration gradient?
In Case 1 described in the text, where does the net movement of water occur?
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What is the membrane permeable to in Case 2?
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Which factor results in a faster rate of diffusion according to Fick's Laws?
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What is the role of leak channels in the cell membrane?
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If the extracellular concentration of K+ ions is artificially increased, what would happen to the equilibrium potential for K+ (EK)?
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What effect does the Na+/K+ ATPase have on the cell membrane?
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How does the Nernst Equation relate to ion equilibrium potentials?
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What is the function of the Na+/K+ ATPase in maintaining cell homeostasis?
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How would an increase in extracellular K+ ions affect the equilibrium potential for Na+ (ENa)?
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What happens to the net movement of water in the initial state described in the text?
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What is the final state in terms of water and solute concentrations as mentioned in the text?
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What stops the net diffusion of water in the scenario with pure water on side 1?
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Why do cells care about osmotic pressure?
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What is the term for the voltage difference across the plasma membrane when the cell is at rest?
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What type of movement occurs due to electrostatic attraction or repulsion in cells?
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