Literaturnachweis - Detailanzeige
| Autor/inn/en | Lujan, Heidi L.; LaFrance, Nicole C.; Petersen, Shelby A.; DiCarlo, Stephen E. |
|---|---|
| Titel | Red State or Blue State Depends on the Ventilation Rate: A Respiratory Acid Base "Shock and Awe" Demonstration |
| Quelle | In: HAPS Educator, 24 (2020) 1, S.70-73 (4 Seiten)
PDF als Volltext kostenfreie Datei |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 2473-3806 |
| Schlagwörter | Demonstrations (Educational); Science Instruction; Chemistry; Learning Experience; Physiology; Teaching Methods; Learner Engagement |
| Abstract | This article describes a simple and inexpensive "shock and awe" classroom demonstration for understanding the importance of carbon dioxide (CO[subscript 2]) in acid-base regulation. Before class, a solution was prepared by adding sodium bicarbonate and universal indicator solution to a sample of distilled water contained in a standard plastic water bottle. Upon arriving to class, the students observed the blue-violet solution and were told that the solution could be considered a surrogate for the arterial blood. At this point, a small piece of solid CO[subscript 2] (dry ice) was dropped into the bottle and a balloon, filled with confetti, was placed over the opening of the bottle. As expected, the solution rapidly turned bright pink/red as the solid CO[subscript 2] underwent sublimation and filled the balloon. At this point the balloon was "popped", making a loud noise and flying confetti about the room contributing to the "shock and awe" appeal. Furthermore, CO[subscript 2] was released simulating ventilation. To simulate hyperventilation, a piece of tubing connected to a hand bicycle pump was inserted into the bottle and air was pumped into the solution. As expected, the solution slowly changed from red to orange to yellow to green and finally approached blue as CO[subscript 2] was forced out of the solution. This straightforward and easy to perform demonstration provoked intense interest and provided a memorable learning experience by attracting and sustaining attention and increasing students' motivation to focus on the material. (As Provided). |
| Anmerkungen | Human Anatomy and Physiology Society. PO Box 2945, LeGrange, GA 30421. e-mail: editor@hapsconnect.org; Web site: https://www.hapsweb.org/page/hapsed_home |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2024/1/01 |
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