Question

one way of balancing the concentration of ions and molecules within a cell to maintain homeostasis is to use all but ______________. atp transfers one of its phosphate groups (becoming adp) to a transfer protein. this protein changes its conformation so it can bring needed ions into the cell and get rid of unnecessary ions. a cellular energy b active transport c membrane proteins d phospholipid channels

Explanation:

The process described involves using ATP (cellular energy) for active transport via membrane - proteins. Phospholipids form the cell - membrane bilayer but do not act as channels for this specific ion - transport mechanism described.

Answer:

D. phospholipid channels