Na/ K pumps and exchange transporters

Question 1

What is the purpose of the Na+/K+ pump in neurons?

Answer 1

The Na+/K+ pump creates concentration gradients of Na+ and K+ across the neuron membrane, essential for transmitting nerve impulses

Question 2

How does the Na+/K+ pump function?

Answer 2

The pump transports 3 Na+ ions out of the neuron and 2 K+ ions into the neuron for each cycle, using energy from 1 ATP molecule.

Question 3

Why is the Na+/K+ pump considered an exchange transporter?

Answer 3

The Na+/K+ pump exchanges different ions (Na+ and K+) in opposite directions across the membrane, which is characteristic of exchange transporters.

Question 4

What is the result of the Na+/K+ pump’s action on the membrane?

Answer 4

The pump helps generate a charge imbalance across the membrane, creating a membrane potential (voltage) in the neuron.

Question 5

How much energy is used in each cycle of the Na+/K+ pump?

Answer 5

Each cycle of the Na+/K+ pump uses the energy from 1 ATP molecule.