Nerve impulses travel along the neurons by the opening of channels that allow so
ID: 261207 • Letter: N
Question
Nerve impulses travel along the neurons by the opening of channels that allow sodium ions to flow inward, followed by an outward flow of potassium ions. In order to ensure that the impulse may be produced at any time, sodium is actively transported out of the cell, and potassium is transported into the cell by the sodium/potassium pump. Which of the following types of work is performed by the sodium/potassium pump? mechanical electrical concentration synthetic bioluminescent Nerve impulses travel along the neurons by the opening of channels that allow sodium ions to flow inward, followed by an outward flow of potassium ions. In order to ensure that the impulse may be produced at any time, sodium is actively transported out of the cell, and potassium is transported into the cell by the sodium/potassium pump. Which of the following types of work is performed by the sodium/potassium pump? mechanical electrical concentration synthetic bioluminescent Nerve impulses travel along the neurons by the opening of channels that allow sodium ions to flow inward, followed by an outward flow of potassium ions. In order to ensure that the impulse may be produced at any time, sodium is actively transported out of the cell, and potassium is transported into the cell by the sodium/potassium pump. Which of the following types of work is performed by the sodium/potassium pump? mechanical electrical concentration synthetic bioluminescentExplanation / Answer
Option 3: concentration is the correct answer.
Sodium-potassium pump is an ATPase enzyme that pumps sodium out of cells while pumping potassium into cells, both against their concentration gradients. This is an energy requiring process. For every molecule of ATP hydrolysed three sodium ions are exported and two potassium ions are imported; there is hence a net export of a single positive charge per pump cycle.
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