The sodium-potassium pump, shown below, is a mechanism that allows cells to move sodium ions out of the cell and potassium ions into the cell, against a concentration gradient (i.e., from a low concentration to a high concentration).
Picture of sodium pump
This mechanism maintains the correct concentrations of sodium and potassium ions inside of a nerve cell. Although this pump uses energy, it is necessary to maintain these conditions so nerve impulses can be transmitted properly.
Which of the following statements does this information best support?
A.
Living organisms have processes and structures that help them maintain homeostasis.
B.
Evolution has increased the number of non-essential processes in living organisms.
C.
Energy is generated during most of the processes that occur in living organisms.
D.
Organisms that are living today use more energy than their ancestors.