Question

The Na - K ATPase is also known as the NaK Pump. It is responsible for maintaining the high extracellular sodium ion concentration. What happend immediately after the pump hydrolyzes ATP?

a)Na is bound
b)ADP is bound
c) the pump is phosphorlated
d)the pump changes conformation

Answer 1

After hydrolyzing ATP, the Na-K ATPase pump changes conformation, allowing it to bind three Na+ ions, which are then released into the extracellular fluid. The pump then binds two K+ ions and returns to its original conformation.

Step-by-step explanation:

After the Na-K ATPase pump hydrolyzes ATP, the pump changes conformation. This conformational change allows the pump to bind three Na+ ions. The binding of these ions causes another conformational change, releasing the Na+ ions into the extracellular fluid. The release of Na+ ions triggers another allosteric change, after which two K+ ions are able to bind to the pump, leading to the release of the phosphate group from the pump protein and returning the pump to its original conformation.