Question

12. Which example below best illustrates active transport?

a. Water molecules move into red blood cells placed in pure water causing them to swell and to burst.
b. Glucose molecules move into animal cells through membrane proteins from a region of higher concentration to
a region of lower concentration.
c. Sodium ions
are pumped from a region of lower concenitation to a region of higher concentration in the nerve
cells of humans.
d. Food coloring molecules spread out in a cup of water when a drop of dye is added to the solution.

Answer 1

c. Sodium ions are pumped from a region of lower concentration to a region of higher concentration in the nerve cells of humans.

Step-by-step explanation: