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Biology Chapter on Membrane Transport

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Questions and Answers

What is the primary function of the sodium-potassium pump?

Facilitating glucose uptake into the cell

Influx of calcium ions into the cell

Regulating cell signal transduction

Maintaining Na+ and K+ gradients across the plasma membrane (correct)

Which molecule provides the energy for the sodium-potassium pump to function?

NADH

Glucose

ATP (correct)

GTP

During the operation of the sodium-potassium pump, how many sodium ions are exported for every two potassium ions imported?

Four sodium ions for every two potassium ions

Two sodium ions for every one potassium ion

One sodium ion for every one potassium ion

Three sodium ions for every two potassium ions (correct)

What happens to the sodium ions once they are released by the sodium-potassium pump?

They are released outside of the cell Signup and view all the answers

What ion does the proton pump actively transport out of the cell?

Hydrogen ions Signup and view all the answers

What occurs after the sodium ions are released from the pump?

The pump binds potassium ions from outside the cell Signup and view all the answers

Which process is actively performed by the proton pump?

Actively transporting H+ ions out of the cell Signup and view all the answers

What happens to the pump after the phosphate is released from ATP?

The pump resets to its original shape Signup and view all the answers

What role do protons (H+) play in co-transport mechanisms?

They assist in transporting sucrose back into the cell Signup and view all the answers

Biology Chapter on Membrane Transport

Choose a study mode

Podcast

Questions and Answers

What is the primary function of the sodium-potassium pump?

Which molecule provides the energy for the sodium-potassium pump to function?

During the operation of the sodium-potassium pump, how many sodium ions are exported for every two potassium ions imported?

What happens to the sodium ions once they are released by the sodium-potassium pump?

What ion does the proton pump actively transport out of the cell?

What occurs after the sodium ions are released from the pump?

Which process is actively performed by the proton pump?

What happens to the pump after the phosphate is released from ATP?

What role do protons (H+) play in co-transport mechanisms?

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