Last Name:
First Name:
20 points total
Feel free to modify the layout of the worksheet as needed. Here are examples of what you may do. A) You may print this, complete the form, scan the document, and then add the screen captures to the document. B) You may keep it digital and never print it. C) If you think of another way to work on this document you may with the exception that it follows the original order closely. Please make sure your answers stand out from the original text. Look over the worksheet prior to starting. Thank you for your effort. Good luck.
Lab Write-up
The virtual lab provides you will clear instructions.
- Define and explain the following terms using your own words and give a citation: (6 points) – Please make sure your answers stand out from the original text.
- summation
- tetanus
- fatigue
- Summation experiment: After collecting your data, look at the second graph which has peak muscle contraction plotted against interval between stimuli. What trends do you observe? Relate your explanation to your data. Make sure you title each figure you attach. This way you can refer to Figure 3, for example. Adding only “Figure 3” is insufficient as a title. (1 point)
- Tetanus experiment: After collecting your data, look at the second graph, which has peak muscle contraction plotted against interval between stimuli. What trends do you observe? Refer to your data. Make sure you title each figure you attach. This way you can refer to Figure 3, for example. Adding only “Figure 3” is insufficient as a title. (1 point)
- Tetanus experiment: Continued from question 2. At which inter-pulse interval does fused tetanus begin to occur? (1 point)
- Fatigue experiment: What is the voltage used to stimulate the muscle? Is this varied, or not? (1 point)
- Fatigue experiment: Begin by setting the time to 1 msec.
- In the experiment each stimulus is a burst of [BLANK]. (Fill in the blank) (1 point)
- Setting the time to 1 msec, now press “stimulate” and answer the following: Discuss why the contractile force is changing in the image below even though the stimulus is maintained. The arrows identify regions of the response you need to help explain. Keep in mind that the video for that lab will help you. (2 points)
Figure 1. A force (g) over time (min) response curve of an isolated gastrocnemius frog muscle receiving a tetanic stimulus of 2V.
- Fatigue experiment: In terms of degree of force generated, describe what is happening as the time between twitches is changed? Refer to your data. Make sure you title each figure you attach. This way you can refer to Figure 3, for example. Adding only “Figure 3” is insufficient as a title. (2 points)
- Attach a screenshot of the data you collected. Identify each data file with a title. (1 point for the figures & 3 points for the titles). You must complete all parts to earn these points. The titles must fully explain the data.
- Completing everything as requested: 1 point.
THIS CONCLUDES THE LAB
