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Tiring Our Muscles With A Clothespin

1/31/2014

My Graph

Was it difficult to use the same technique throughout the whole experiment?
How did you hands and fingers feel BEFORE, DURING, and AFTER the experiment?
(Q1) Is there a pattern to your data table or graph? Do the numbers increase, decrease, or stay the same?
(Q3) What could these patterns in your table or graph indicate?
(Q4) Are your results reliable? Is there anything you could have done to make your results more reliable? Explain. What errors or inconsistencies might have affected your results?
Why did your hand strength change over the course of this experiment?
How do you think your muscle cells get oxygen, nutrients, and water to make the energy they need to function?
What do you think you could have done to prevent your muscles from tiring?
What should you do if you experience muscle fatigue in the future?

1. Yes!!! It was extremly hard to hold the clothespin the same way, the same amount of time, over, and over, and over again.
2. Before the experiment my fingers felt fine, but I was really nervous. During the experiment my fingers felt like they were on fire. After the experiment my fingers felt like they were going to fall off at any second.
3. There is a pattern to my data table ( I think ). It continues to go up and down and up and down. It looks like mountains, the way some of them are bigger and some of them are smaller.
4. They could indicate that I would use a lot of my energy and do good on one of them, then on the next one, because I used all of my energy, I wouldn't do so good on the next one.
5. I think my results are reliable because they start up high, go down lower, then towards the end come back up. I also think that because I tried my hardest. Something that could have effected my results was that my clothespin was bad from the start, but it was getting really jacked up towards the middle of the experiment, so we grabbed a different clothespin (according to the graph, you can probabaly tell when that was).
6. My hand strength changed because once I use all my "hand energy" I get tired and don't have any more energy. My hand just gets exerted over time.
7. I know it has something to do with my organs and how they work, but I haven't learned that yet so I;m not exactly sure how that works.
8. I could have taken long breaks in between each 30 second trial, but we didn't have that, we had about 1:30 in between each trial. I think that would help because that would give our muscles a break and time to relax a little bit.
9. If I experience muscle fatigue in the future I will take a break and catch my breath, so my heart has time to slow down. If I don't then my heart could be going to fast, and that could be bad. Or my muscles could get really tired and that could be bad too.

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Delivering What Muscles Need

1/30/2014

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My Graph

Activity Ranking Number of Heart Rate
pulses in 15 seconds

Sitting
walking
jogging in place
acting like a fool
jumping jacks

1
2
3
4
5

21
23
27
24
32

     x4
             x4
             x4
             x4
             x4

84
92
101
96
128

Which activities increased your heart rate the most?
Which activities increased your heart rate the least?
Was the order in which you ranked the activities accurate? (It's good to be wrong!) Explain.
What changes did you notice about your heart rate as you became more active?
Why do you think your heart rate changed when you were more active? What inference can you make? (Use pages 65–66 of your reference book to help you answer this question.)

Answers
1. Jumping jacks increased my heart rate the most. I predicted that because I know that when you do jumping jacks you are jumping and moving your arms at the same time, so that's double the exercise then the other ones.
2. Sitting increased my heart rate the least. I predicted that right too, and i predicted it because when you are sitting you are using the least amount of muscles compared to the others.
3. I ranked sitting to least increase my heart rate, then walking, then jogging in place, then acting like a fool, and to most increase my heart rate is jumping jacks. I ranked them in order from what uses the most muscles, because I think that the more muscles the harder you work. And the harder you work, the faster your heart rate is.
4. As I became more active, my heart rate went up. At the start my heart rate was at around 84 beats per minute. then at the end it was at 128 beats per minute.
5. My heart rate changed when I was more active because I was working hard. I'm not exactly sure, but I think this happened because my body needed more energy, so my heart beat faster to give it to me.

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Creating an Elbow Joint

1/10/2014

1 Comment

- How many bones did your model need? How many muscles did it need?
- How were your pretend muscles similar to real muscles? Different?
- What changes occur to the real muscles in the human body to make them pull on bones?
- What would happen if the ligaments of the models were overstretched or torn? How would it affect the way the models could operate?

1. Our model only needed 2 bones. It only needed 2 muscles two; the bicep and the tricep.
2. They were similar because they both worked together to bend something. They were different because one is real bone and the other one is cardboard.
3. To pull on the bones, the muscles have to relax and contract.
4. If the ligaments were overstretched or torn they wouldn't be able to connect the bones to each other, and then we wouldn't be able to move properly. It would effect the model because then there wouldn't be a ligament to attach at the joint, and the 2 bones wouldn't hold together good.

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Tiring Our Muscles With A Clothespin

Delivering What Muscles Need

Creating an Elbow Joint

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