Respiration and Fermentation in Human Muscles



Respiration and Fermentation in Human Muscles

Name _____________________________ Date _______________ Class Period ____

Objective:

To investigate the effect of fatigue on the action of your muscles and to relate your observations to cellular respiration

Materials:

Clothespin

Watch or clock

Procedure:

1. As quickly as your can, open and close the clothespin for 30 seconds with the thumb and index finger of your dominant hand. Try to do this as many times as you can in 30 seconds.

2. Record your results in the data table.

3. Repeat 9 more times with the same hand. DO NOT REST BETWEEN TRIALS!

4. After completing the data with your dominant hand, use your non-dominant hand and repeat the procedure.

Data Table:

|Trial # |Dominant Hand (right or left) |Non-Dominant Hand |

|1 | | |

|2 | | |

|3 | | |

|4 | | |

|5 | | |

|6 | | |

|7 | | |

|8 | | |

|9 | | |

|10 | | |

Analysis:

1. Did your hands show fatigue? What effect did fatigue have on the action of your hand muscles? If your hand muscles did not show fatigue, why not?

2. Which hand (dominant or non-dominant) was able to squeeze the clothespin more often? Why would that be?

3. Make a 2-color line graph of your data on the back of this sheet. Be sure to label your axes and title your graph.

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4. Explain how our cells (including muscle cells) get the energy they need from food.

5. What produces muscle fatigue? Think about what energy-storing molecule muscles must have in order to function.

6. Compare the anaerobic process which produces muscle fatigue with the normal process of aerobic respiration which would occur in an unstressed hand. Explain the difference between the amount of ATP produced in aerobic versus anaerobic respiration.

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