TAILIEUCHUNG - Ebook Lippincott illustrated reviews flash cards - Physiology: Part 2

(BQ) Part 2 book "Lippincott illustrated reviews flash cards - Physiology" presentation of content: Respiratory system, respiratory system, gastrointestinal system, gastrointestinal system, living and dying. | Question Lung Airways Contrast the properties of airways that make up the bronchial tree’s conducting zone with those of the respiratory zone. Why are smokers prone to coughing episodes and bronchitis? Conducting zone Which airways create the greatest resistance to airflow in a normal lung, and why? 0 Trachea 1 2 3 Bronchi 4 Bronchiole 5 Respiratory zone 17 18 Respiratory bronchiole 19 20 Alveolar 21 duct 22 Alveolar 23 sac Lippincott Illustrated Reviews Flash Cards: Physiology 197 Copyright © 2015 Wolters Kluwer 5/2/14 8:02 PM Answer Lung Airways Conducting zone versus respiratory zone airways: Respiratory zone • Houses the blood–gas interface 0 Trachea Conducting zone Conducting zone • Do not participate in gas exchange • Mechanically supported with cartilage (larger airways) • Lined with a ciliated epithelium 2 3 Bronchi 4 Bronchiole The sites of highest resistance to airflow are the pharynx and larger airways (generations 0 through ϳ7). Resistance is proportional to cross-sectional area. Although larger airways are wider than smaller airways, the latter are far more numerous so their collective cross-sectional area is proportionally greater. [Note: Airflow resistance is calculated with the Poiseuille law (see ).] 5 17 Respiratory zone Tobacco smoke immobilizes respiratory cilia, which normally propel mucus with entrapped particulates, including bacteria, upward and out of the lungs (the mucociliary escalator). When allowed to accumulate, these inhaled irritants cause epithelial inflammation and infection, thereby predisposing smokers to coughing and bronchitis. 1 18 Respiratory bronchiole 19 20 Alveolar 21 duct 22 Alveolar 23 sac Lippincott Illustrated Reviews Flash Cards: Physiology 198 Copyright © 2015 Wolters Kluwer 5/2/14 8:02 PM Question Blood–Gas Interface What are the functions of the structures located at the blood–gas interface, as indicated by boxed .

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• Lippincott illustrated reviews flash cards
• Respiratory system
• Respiratory system
• Gastrointestinal system
• Gastrointestinal system
• Living and dying
• Lippincott illustrated reviews flash cards biochemistry
• Protein structure and function
• Carbohydrate metabolism
• Lipid metabolism
• Collagen synthesis
• Enzyme inhibition
• Nitrogen metabolism
• Metabolism integration
• Genetic information storage
• Blood clotting
• Principles of physiologic function
• Sensory and motor systems
• Musculoskeletal and integumentary systems
• Cardiovascular system
• Drug Eluting Balloon
• Additional Therapy
• Cell Death Following
• Preclinical Studies
• Antidepressants and Morphological
• Monoamine Neurons