Active transport processes:
A)move solutes with or along their concentration gradients.
B)require cells to expend energy (ATP).
C)move solutes from a higher concentration to a lower concentration.
D)move solutes through the phospholipid bilayer without the use of integral proteins.

Question

Quizplus · Accepted Answer

Active transport processes require cells to expend energy (ATP) to move solutes against their concentration gradients, from an area of lower to higher concentration. This is in contrast to passive transport processes (such as diffusion and facilitated diffusion), which move solutes with or along their concentration gradients. Active transport is necessary for cells to maintain concentration gradients of ions and molecules, and is involved in processes such as nutrient uptake, hormone secretion, and muscle contraction.

Active Transport Processes