- The cell membrane regulates what enters and exits the cell and also provides protection and support.
- The composition of nearly all cell membranes is a phospholipid bilayer sheet called a lipid bilayer.
- The lipid bilayer gives cell membranes a fluid structure that forms a selective barrier between the cell and its environment.
- Most cell membranes contain protein molecules that are embedded in the phospholipid bilayer.
- The proteins form channels and carriers that help to move material across the cell membrane.
- Particles move constantly and the most common is diffusion, which does not require energy and particles move from an area of high concentration to low concentration.
Letter A: Phospholipid bilayer
Letter B: Protein (yellow)
Letter E: Carbohydrate Chain (red)
Letter F: Phosphate Heads (blue)
Letter G: Fatty acid tails (orange)
Parent Tip: Review the logic above to help your child master the concept of cell membrane coloring worksheet answer key biology junction.
