Sodium-potassium pumps, endocytosis, and exocytosis all involve active transport. Which of the following is a characteristic of active transport? (SC.912.L.14.3)
*
1 point
a. It involves facilitated diffusion.
b. It requires energy from the cell.
c. It relies on vesicles that often function as pumps.
d. It moves substances with a concentration gradient.