Multiple Choice
Which client is at risk for the development of a potassium level of 5.5 mEq/L (5.5 mmol/L)?
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11. Nervous Tissue and Nervous System
Ions - Sodium and Potassium
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Which of the following statements is false regarding the sodium-potassium pump?
A
It transports sodium ions out of the cell and potassium ions into the cell.
B
It requires ATP to function.
C
It moves ions against their concentration gradients.
D
It allows sodium and potassium ions to move freely across the cell membrane.
Verified step by step guidance1
Understand the function of the sodium-potassium pump: It is a type of active transport mechanism that moves sodium (Na+) and potassium (K+) ions across the cell membrane.
Recognize that the pump works against the concentration gradient: It moves sodium ions out of the cell and potassium ions into the cell, both against their respective concentration gradients.
Acknowledge the energy requirement: The sodium-potassium pump requires energy in the form of ATP to function, as it is moving ions against their concentration gradients.
Identify the false statement: The statement that the pump allows sodium and potassium ions to move freely across the cell membrane is false because the pump actively transports these ions, not passively.
Conclude that the sodium-potassium pump is an example of active transport, which is characterized by the use of energy to move substances against their concentration gradients.
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