5.1 - Primary Active Transport
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Practice Questions
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What is primary active transport?
💡 Hint: Think about energy usage.
Name one example of primary active transport.
💡 Hint: It's crucial for maintaining ion balance.
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Interactive Quizzes
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What is the primary function of the Na⁺/K⁺ pump?
💡 Hint: Think about the roles of sodium and potassium in cells.
True or False: The Na⁺/K⁺ pump always moves ions with their concentration gradient.
💡 Hint: Review the definitions of active versus passive transport.
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Challenge Problems
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If a cell has a [Na⁺] of 15 mM and a [K⁺] of 1.0 mM inside and is exposed to an environment with [Na⁺] of 5 mM and [K⁺] of 2.0 mM, calculate the net changes in concentration inside the cell after the operation of the Na⁺/K⁺ pump.
💡 Hint: Remember how the pump operates to keep Na⁺ and K⁺ balanced.
A scientist measures the Km of a variant of the Na⁺/K⁺ pump, finding it to be 18 mM for Na⁺. How does this compare to the normal value, and what might it indicate about this variant's efficiency?
💡 Hint: Consider the implications of Km values on enzyme activity.
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