1. I. Objectives for section 7-2: The Plasma Membrane A.State the function of the cell membrane B.Explain how proteins, carbohydrates, and cholesterol play a role in the plasma membrane Section 2

2. II. Plasma Membrane is a thin, flexibleboundary between the cell and its environment Cellular Structure and Function A.Allows nutrients into and wastes to leave the cell Section 2

3. B. Selective Permeability: controls movement of substances into and out of cell Cellular Structure and Function C. Controls amount of substances entering and leaving the cell Section 2

4. D. Composed of phospholipid bilayer Cellular Structure and Function 1.Composed of a glycerol backbone, two fatty acid chains, and a phosphate group Section 2 2. Polar (partially charged) head and 2 nonpolar (no charge) tails

5. Phospholipid bilayer Section 2

6. Phospholipid molecule Lipid bilayer Lipid bilayer makes up the cell membrane E. Overall picture

7. F. Fluid Mosaic Model Cellular Structure and Function 1.Bilayer allows other molecules to “float” in membrane Section 2 Transport protein

8. 2. Nonpolar tails on inside do not allow water-soluble substances to pass through easily a.Allows cell to separate inside environment from the outside b.Proteins are held in membrane in a similar fashion Section 2

9. A. Proteins act as a support structure Cellular Structure and Function III. Other components of plasma membrane Section 2

10. 1. Receptor proteins transmit signals inside the cell a.“intercellular communication ” Section 2

11. 2. Transport proteins: aid movement of substances into and out of cells Section 2

12. 3. Marker proteins: attached to a carbohydrate on cell’s surface and advertise cell type a.Will recognize foreign invaders including transplanted organs!! Section 2

13. Cellular Structure and Function B. Cholesterol prevents fatty acid tails from sticking together Section 2

14. C. Carbohydrates identify chemical signals Cellular Structure and Function Section 2

15. Cellular Structure and Function Section 2

16. FQ 5 1.A 2.B 3.C 4.D Cellular Structure and Function A. identifiers B. receptors C. supporters D. transporters 1. Which term describes the function of proteins found on the outer surface of the plasma membrane? Section 2 Formative Questions Chapte r

17. FQ 6 1.A 2.B 3.C 4.D Cellular Structure and Function Section 2 Formative Questions A. phospholipids B. proteins C. carbohydrates D. cholesterol molecules 2. Which component of the plasma membrane contributes to the fluidity of the plasma membrane? Chapte r

18. FQ 7 1.A 2.B 3.C 4.D Cellular Structure and Function Section 2 Formative Questions 3. What is the function of carbohydrates that stick out from the outer surface of the plasma membrane? A.They give the cell shape and enable it to move. B.They give the plasma membrane fluidity. C.They help the cell identify chemical signals. D.They hold the cell in place. Chapte r

19. STP 2 1.A 2.B 3.C 4.D Cellular Structure and Function Standardized Test Practice A.membrane proteins B.transport proteins C.the nonpolar tails in the middle of the plasma membrane D.the polar heads facing the inside and outside of the cell 4. What part of the plasma membrane makes it difficult for water-soluble substances to move freely into and out of the cell? Chapte r

20. FQ 5 1.A 2.B 3.C 4.D Cellular Structure and Function A. identifiers B. receptors C. supporters D. transporters 1. Which term describes the function of proteins found on the outer surface of the plasma membrane? Section 2 Formative Questions Chapte r

21. FQ 6 1.A 2.B 3.C 4.D Cellular Structure and Function Section 2 Formative Questions A. phospholipids B. proteins C. carbohydrates D. cholesterol molecules 2. Which component of the plasma membrane contributes to the fluidity of the plasma membrane? Chapte r

22. FQ 7 1.A 2.B 3.C 4.D Cellular Structure and Function Section 2 Formative Questions 3. What is the function of carbohydrates that stick out from the outer surface of the plasma membrane? A.They give the cell shape and enable it to move. B.They give the plasma membrane fluidity. C.They help the cell identify chemical signals. D.They hold the cell in place. Chapte r

23. STP 2 1.A 2.B 3.C 4.D Cellular Structure and Function Standardized Test Practice A.membrane proteins B.transport proteins C.the nonpolar tails in the middle of the plasma membrane D.the polar heads facing the inside and outside of the cell 4. What part of the plasma membrane makes it difficult for water-soluble substances to move freely into and out of the cell? Chapte r