McCance & Heather’s Pathophysiology 9th Edition Chapter 1- 49 + NCLEX case studies | All Chapters, EXAM WITH 100% VERIFIED AND CORRECT ANSWERS(UPDATED2024)

McCance & Heather’s Pathophysiology 9th Edition Chapter 1- 49 + NCLEX case studies | All Chapters, EXAM WITH 100% VERIFIED AND CORRECT ANSWERS(UPDATED2024) 9. Which structure prevents water-soluble molecules from entering cells across the plasma membrane? NURSINGTB.COM PATHOPHYSIOLOGY 8TH EDITION MCCANCE TEST BANK a. Carbohydrate chains c. Membrane channel proteins b. Glycoprotein channels d. Lipid bilayer ANS: D The bilayer’s structure accounts for one of the essential functions of the plasma membrane. It is impermeable to most water-soluble molecules (molecules that dissolve in water) because the water-soluble molecules are insoluble in the oily core region. The bilayer serves as a barrier to the diffusion of water and hydrophilic substances while allowing lipid-soluble molecules, such as oxygen (O2) and carbon dioxide (CO2), to diffuse through it readily. The other options do not correctly describe this process. PTS: 1 REF: Pages 12-13 10. The fluid mosaic model explains: a. How a cell membrane functions b. Why our bodies appear to be solid c. How tissue is differentiated d. How fluid moves between the intracellular and extracellular compartments ANS: A The fluid mosaic model accounts for the flexibility of cellular membranes, their selfsealing properties, and their impermeability to many substances. The remaining options do not explain the mosaic model. PTS: 1 REF: Page 12 | What's New box