Question Detail
Question
Diffusion does not require the cell to expend ATP. Therefore, diffusion is considered: a. Endocytosis b. Exocytosis c. Active transport d. Passive transport
Correct Answer
Option D is the correct answer.
Detailed Explanation
Any process that moves substances across a membrane without the direct expenditure of cellular energy (ATP) is classified as passive transport. Diffusion, facilitated diffusion, and osmosis are all examples of passive transport, driven by the kinetic energy of molecules.
Hint
The opposite of 'active' – this type of transport doesn't require work from the cell.