The Structure and Function of the Plasma Membrane

Examine the diagram of the plasma membrane below. Identify the numbered components of the plasma membrane above by clicking on the blank with the corresponding number and choosing the correct term. 1. Channel Protein2. Carbohydrate3. Glycoprotein4. Carrier Protein5. Glycolipid6. Integral Protein 7. Peripheral Protein8. Phosphate Head9. Fatty Acid Tails10. Phospholipid11. Cholesterol 12. The cell membrane is also called the _ which describes its structure and behavior. solid mosaic model fluid liquid model fluid mosaic model liquid mosaic model 13. According to the fluid mosaic model, what is the plasma membrane made of? Mark ALL that apply. Phopholipids Minerals Proteins Cholesterol Vitamins Carbohydrates Complete the following statement about the phospholipids that make the plasma membrane by clicking on the blanks and choosing the correct word(s). 14. Each phospholipid is made of a polar head called the phosphate head which is hydrophilic, or water loving, and two nonpolar fatty acid tails that are hydrophobic, or water fearing. The phospholipids are arranged in a lipid bilayer. Complete the following statements by clicking on the blanks and choosing the correct option. 15. Cholesterol molecules are located between the phospholipids and help stabilize the plasma membrane. a) At low temperatures, they prevent phospholipids from packing together to solidify and become too rigid. b) At high temperatures, they restrict movement to keep them from becoming a liquid or too fluid.. 16. A variety of proteins are embedded within the plasma membrane. Match the types of proteins with the correct description by clicking on the table and choosing the correct option. Protein Description Carrier Protein change shape to allow molecules to pass through; requires energy Channel Protein form a tunnel molecules or ions can pass through; requires NO energy Integral Protein protein permanently integrated in the cell membrane Peripheral Protein protein temporarily attached only to the surface of the cell membrane (inside or outside of the cell) to an integrated protein Transmembrane Protein integral protein that spans the entire width of the plasma membrane Complete the following statements by clicking on the blanks and choosing the correct word(s). 17. Some proteins and lipids have carbohydrate chains attached to their outer surfaces. If they are attached to a protein, they are called a glycoprotein and if they are attached to a phospholipid, they are called a glycolipid. Their main function for signaling cell to cell or pathogen recognition. Match the following components of the Cell Membrane by clicking on a term in the left column and then the correct description in the right column. A line will be drawn between the two. Part 1 Carbohydrates Present only on the outer surface of the plasma membrane; used for signaling; include glycoprotein and glycolipid Carrier Protein Protein permanently integrated into the plasma membrane that change shape to allowing molecules to pass through requiring energy Channel Protein Protein permanently integrated into the plasma membrane that forms a tunnel molecules or ions can pass through requiring no energy. Cholesterol Located in between the fatty acid tails in the lipid bilayer of the plasma membrane that helps to maintain the consistency of the plasma membrane. Fatty Acid Tails The two hydrophobic (water fearing) nonpolar tails of a phospholipid. Part 2 Glycolipid A carbohydrate attached to a lipid on the outer surface of the plasma membrane. Glycoprotein A carbohydrate attached to a protein on the outer surface of the plasma membrane. Integral Protein Permanently integrated proteins in the plasma membrane. Peripheral Protein Temporally attached protein on the surface of the plasma membrane . Phospholipid A phosphate group with two fatty acid tails; makes up the majority of the plasma membrane.