Question

How does simple diffusion happen?

Answer 1

Simple diffusion:

1. Simple diffusion is the movement of solutes across a semipermeable barrier or a solution along a concentration gradient.
2. The formation of hydrogen bonds between water molecules and solutes causes simple diffusion.
3. Individual solute molecules are surrounded by water molecules, which maximizes hydrogen bonding.
4. Simple diffusion can occur across cell membranes, between the individual phospholipids that make up the membrane, if the molecules are tiny enough.
5. Simple diffusion allows water to travel along a concentration gradient through a cell membrane in this way.
6. Bacteria have been observed delivering water and oxygen to the cytoplasm by simple diffusion.