Question

$N{{a}^{+}}$, ${{K}^{+}}$ pump is found in membranes of many cells, like nerve cells. It works against the electrochemical gradient and involves integral proteins ATP. For each molecule ATP used is
A. 3 ions of $N{{a}^{+}}$ pumped out and 2 ${{K}^{+}}$ are taken in.
B.3 ions of $N{{a}^{+}}$ are taken in and 2 ${{K}^{+}}$ are pumped out.
C. 2 ions of $N{{a}^{+}}$ are thrown out and 3 ${{K}^{+}}$ absorbed.
D. 3 ions of ${{K}^{+}}$ are absorbed and 3 $N{{a}^{+}}$ are pumped out.

Answer 1

The sodium and potassium pumps are used as transporters for ions and molecules across the cell membrane. The sodium pump pumps out and the potassium pumps ion in a fixed ratio across the cell membrane.

Complete answer: The $N{{a}^{+}}$/${{K}^{+}}$ -ATPase additionally called $N{{a}^{+}}$/${{K}^{+}}$ pump is associate in nursing anti-porter-like protein situated within the cell wall of all animal cells. $N{{a}^{+}}$/${{K}^{+}}$-ATPase protein pumps require oxygen out of the cells whereas pumping other elements into the cells. The method of moving oxygen and element ions across the cell wall is a lively transport process involving the chemical reaction of nucleotides to supply the required energy. When the charge separation across the membrane is referred to as the nerve fibre membrane is maintained, the nerve cell is alleged to be at rest. This Condition is completely referred to as the electric potential. A resting nerve cell is charged on the inner aspect and is charged on the fiber outer aspect. Such a charge separation is termed as Polarization and therefore resting nerve cell is alleged to be polarized, fibre electric potential, the nerve fibre membrane is relatively additional leaky to metal ions and nearly impermissible to oxygen ions. The membrane is water-repellent to charged proteins present at intervals in the axoplasm and co-jointly, $N{{a}^{+}}$, the axoplasm contains a high concentration of ${{K}^{+}}$ and (negatively) charged proteins and low concentration of $N{{a}^{+}}$. In distinction, the humor contains a high concentration of Na+ and low concentration of ${{K}^{+}}$. These ionic molecules move across the resting membrane area unit maintained by the transport of ions by the sodium-potassium pump that transport 3 $N{{a}^{+}}$ outward for 2 ${{K}^{+}}$ into the cells on the worth of 1 adenosine triphosphate(nucleotide). Therefore, the outer surface of the nerve fiber membrane possesses an electric charge whereas its inner surface becomes charged.
Hence choice A is correct.

Note: The $N{{a}^{+}}$/${{K}^{+}}$ pump is incredibly necessary and essential if it stops operating the Na+ are going to be excess in within the liquid body substance. The $N{{a}^{+}}$/${{K}^{+}}$ pump, placed within the cytomembrane of the cells is like an associate degree antiporter like the protein found all told animal cells. The fast movement of $N{{a}^{+}}$ ions from humor to within the vegetative cell ends up in depolarization.