Question

Select the statements that describe the operation of the sodium–potassium pump. (More then one statement is correct)

The sodium–potassium pump transports sodium and potassium down their concentration gradients.

For every two sodium ions pumped out of the cell, three potassium ions are pumped into the cell.

For every exchange of sodium and potassium ions, one ATP molecule is hydrolyzed.

The sodium–potassium pump actively transports ions across the membrane, which maintains homeostasis.

Answer 1

Answer Option 1, 3 and 4 are correct

Option 1 is correct as the sodium–potassium pump transports sodium and potassium down their concentration gradients against the large concentration gradients to maintain the equilibrium/ homeostasis

Option 2 is incorrect as for every 3 sodium ions pumped out of the cell, 2 potassium ions are brought in to stabilize the membrane potential

Option 3 is correct as during the process of ion exchange and sodium-potassium transport, the hydrolysis of ATP molecule takes place

Option 4 is correct as the active transport through sodium-potassium pump helps with ion transport across cell membrane which helps in stabilization of membrane potential thus maintaining homeostasis.