Open Question
Which of the following forms of membrane transport require specific membrane proteins?a. diffusion;b. exocytosis;c. facilitated diffusion;d. active transport;e. facilitated diffusion and active transport
6. The Membrane
Active Transport
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Which of the following defines the type of transport by the sodium-potassium pump?
A
Active transport through a symporter.
B
Passive transport through a symporter.
C
Active transport through an antiporter.
D
Passive transport through an antiporter.
Verified step by step guidance1
Understand the function of the sodium-potassium pump: It moves sodium (Na+) and potassium (K+) ions across the cell membrane against their concentration gradients.
Recognize that moving ions against their concentration gradient requires energy, typically in the form of ATP, which is a characteristic of active transport.
Identify the type of protein involved: The sodium-potassium pump is an antiporter because it moves two different ions in opposite directions across the membrane.
Differentiate between active and passive transport: Active transport requires energy input, while passive transport does not.
Conclude that the sodium-potassium pump is an example of active transport through an antiporter, as it uses energy to move Na+ and K+ ions in opposite directions.
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