1. The cell membrane is selectively permeable, allowing only certain substances to pass through while blocking others.
2. It maintains homeostasis by regulating the movement of materials in and out of the cell.
3. The phospholipid bilayer forms the basic structure, with hydrophilic heads facing outward and hydrophobic tails facing inward.
4. Proteins embedded in the membrane facilitate transport, communication, and enzymatic reactions.
5. Cholesterol provides fluidity and stability to the membrane at varying temperatures.
6. Glycoproteins and glycolipids on the outer surface aid in cell recognition and signaling.
7. The fluid mosaic model describes the dynamic nature of the membrane, where components can move laterally within the bilayer.
8. Passive transport (diffusion, osmosis, facilitated diffusion) moves substances without energy input.
9. Active transport requires energy (ATP) to move substances against their concentration gradient.
10. Endocytosis and exocytosis are processes for transporting large molecules or particles across the membrane via vesicles.
Parent Tip: Review the logic above to help your child master the concept of cell membrane structure worksheet.
