23: Sodium Potassium Pump

Why are pumps important in fish tanks?

• They provide food for the fish.

• They decorate the tank.

• They help to aerate the water and filter it.

• They change the water color.

What is ATP's role in cellular pumps?

• It provides energy to power the pumps.

• It acts as a structural component.

• It transports ions directly.

• It acts as a waste product.

What is one major function of the sodium-potassium pump?

• To produce glucose.

• To store calcium.

• To aerate the cells.

• To maintain a resting membrane potential.

Tags

NGSS.HS-LS1-3

How many sodium ions bind to the sodium-potassium pump initially?

• Four

• One

• Two

• Three

What happens to the sodium-potassium pump when it is phosphorylated?

• It releases ATP.

• It changes shape and opens to the outside.

• It binds to glucose.

• It becomes inactive.

What is the result of the sodium-potassium pump's activity?

• More sodium inside the cell and more potassium outside.

• Equal concentration of sodium and potassium inside and outside the cell.

• No change in ion concentration.

• More potassium inside the cell and more sodium outside.

Tags

NGSS.HS-LS1-3

What is an electrochemical gradient?

• A difference in pH levels across a membrane.

• A difference in temperature across a membrane.

• A difference in charge and ion types across a membrane.

• A difference in water concentration across a membrane.

Why is the cell membrane more permeable to potassium at rest?

• Because potassium is more reactive.

• Because potassium is smaller than sodium.

• Because there are more sodium leakage channels.

• Because there are more potassium leakage channels.

What contributes to the cell's more negative charge inside?

• Movement of negative potassium ions out of the cell.

• Movement of positive sodium ions into the cell.

• Movement of negative sodium ions into the cell.

• Movement of positive potassium ions out of the cell.

What other molecules rely on the electrochemical gradient established by the sodium-potassium pump?

• Proteins that transport oxygen.

• Proteins that transport lipids.

• Proteins that transport glucose.

• Proteins that transport carbon dioxide.