lab

During this lab we were supposed to see how many times we could squeeze a ball in twenty seconds with our hand a normal temperature and freezing after soaking our hand in ice water. We were also supposed to see what happened as fatigue set in.










Trial # of Squeezes in 20 seconds 9 More X's
1 66 63
2 50 46
3 63 58
4 61 56
5 54 49
6 53 49
7 51 45
8 49 44
9 49 42
10 45 38
ANALYSIS OF DATA:
1. What are the three changes you observed in a muscle while it is working (contracted)? You could see the muscles moving with each squeeze, after a while the muscles started to burn and it was hard to squeeze the ball.
2. What effect did the cold temperature have on the action of your hand muscles? Explain. When the body gets cold everything starts to slow down. Therefore making it harder and painful at times to continue squeezing the ball.
3. In Figure 3, make a line graph of your results of the fatigue experiment. Be sure to fill in the values on the vertical axis.
Figure 3: Graph of Effect of Fatigue on Muscle Action



4. What effect did fatigue have on the action of your hand muscles? Explain.
Fatigue made it hard for me to continue to squeeze the ball. It also made the numbers of times I could decline.