1. You are interested in studying the Na+/K+ pump so you inserted the pump into red blood cell
ghosts (essentially cells with no proteins in their membrane). Describe where in the pumping
cycle the Na+/K+ pump would stop and any movement of Na+ and K+ ions (i.e., into or out of
the RBC ghosts) under the following conditions:
A) Your cells were suspended in a solution that contained both Na+ and K+ ions that was in
equilibrium with the intracellular fluid.
B) You added ATP to the solutions on both sides of the cells described in part A.
C) The intracellular and extracellular solutions contain Na+ and ATP but not K+.
D) You perform the experiment shown in B, but you also embed K+ leak channel into your
ghosts.
