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Alternative Methods for Measuring Action Potential: Cockroach Leg Lab

Explore accessible alternatives to oscilloscopes for measuring action potential in a high school lab. Learn about the Poor Man’s Oscilloscope, Multimeter, and Vernier Sensors. These options provide benefits without the complexity of oscilloscopes, enabling students to gather data effectively. Discover innovative tools to enhance your experiments and engage students in practical science activities.

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Alternative Methods for Measuring Action Potential: Cockroach Leg Lab

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  1. Possible Alternatives to Using an Oscilloscope for Measuring Action Potential in the Cockroach Leg Laboratory Matthew Croft Somerset High School

  2. Summary • While the Measuring Action Potential in the Cockroach Leg Laboratory is interesting and worthwhile, the equipment is not commonly found in a typical high school science department. • In addition, students may have difficulty operating oscilloscopes and obtaining data. • Several alternatives to using oscilloscopes are discussed.

  3. #1. The Poor Man’s Oscilloscope

  4. Introduction • Source: www.ledametrix.com/oscope/ • It may be possible to construct a poor man’s oscilloscope using a 3.5mm audio cable that has been separated into three wires and attached to fine pins:

  5. Measuring Action Potential • Oscilloscope Software • Example: • Audio Editing Software • Examples:

  6. Measuring Action Potential • Sample Data from Audacity: • Speaker (similar to what we did in lab without the oscilloscope)

  7. Benefits & Drawbacks

  8. #2. Multimeter

  9. Introduction • It may be possible to measure action potential on a multimeter set on mV.

  10. Benefits & Drawbacks

  11. #3. Vernier Sensors

  12. Introduction • VernierLabPro and LabQuest allow you to use a wide variety of sensors to collect information. Data can be analyzed in LoggerPro.

  13. Possible Sensors • Voltage Probe

  14. Possible Sensors • EKG Sensor

  15. Benefits & Drawbacks Ulf thinks it will work!

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