I think it is catabolism though I am not sure.
Answer:
They are used to transport electron during metabolic reaction.
This is active transport so the ions go against the concentration gradient. This means that the ions will travel from the place where there are less sodium ions(from the inside of the cell) to the place where there are more sodium ions (to the outside of the cell).
Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.
I think number one is Strongly Linked and the second one is Less Linked. Hope this helps. If it's wrong sorry
