- The image depicts a biological membrane, specifically a phospholipid bilayer, with two types of molecules moving across it.
- One type of molecule is represented by small, paired circles, and the other by larger hexagons.
- Both types of molecules are shown moving from an area of higher concentration (top) to an area of lower concentration (bottom), indicated by the arrows.
- The movement of the small, paired circles occurs directly through the lipid bilayer without any assistance.
- The movement of the larger hexagons occurs through a protein channel embedded in the membrane.
- This process, where molecules move down their concentration gradient without energy expenditure, is known as passive transport.
- The specific subtypes shown are simple diffusion for the small molecules and facilitated diffusion for the larger molecules using a channel protein.
Parent Tip: Review the logic above to help your child master the concept of cell membrane coloring worksheet answer key biology junction.
