Multiple choice

Which of the following processes includes all the others?

  1. Osmosis

  2. Diffusion of a solute across a membrane

  3. Facilitated diffusion

  4. Passive transport

  5. Transport of an ion

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The diffusion of a substance across a biological membrane is called passive transport because the cell does not have to expend energy. This process includes all the others.