GasExchange_BigIdea&WordList - atmospheric pressure...

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Lecture 2/24/12 Chapter 42 Gas Exchange Big Questions / Learning Objectives 1. Based on Fick’s Law, describe the variables that influence diffusion rates. 2. Diagram how countercurrent exchange enhances gas exchange in the fish gill. 3. Describe the basic architecture of the insect gas exchange system. 4. Compare and contrast water and air as gas exchange media.* 5. Explain the role of surfactants in human gas exchange. 6. Compare and contrast the tidal breathing of humans with breathing by birds. 7. Describe the mechanism of negative pressure breathing and the cause of lung collapse when the thoracic cavity is punctured. 8. Explain how and why monitoring of blood pH functions in regulation of breathing in humans. 9. Calculate the partial pressure for a gas at a particular concentration and overall
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Unformatted text preview: atmospheric pressure. 10. Describe how the partial pressure of oxygen and carbon dioxide vary as blood traces a complete circuit through body tissues, heart, and lungs. 11. Discuss hemoglobin’s structure and function in gas exchange. 12. Explain how the Bohr effect is adaptive with regard to muscle exertion. Topic / Working Vocabulary List alveoli Bohr effect bronchi carbonic acid diaphragm* diffusion gas exchange gill heme group hemoglobin lung negative pressure breathing partial pressure random walk residual volume* respiratory distress syndrome surfactant tidal breathing trachea ventilation *Covered in assigned reading and homework rather than lecture...
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