11.2a Muscles & Movement

09/12/2013 § Leave a comment

I don’t want a lot for Christmas, I just wanna get outta here.

 

DATA BASED QUESTIONS

Page 266, factors affecting muscle growth

1. Compare the changes in body mass in control group 2 and the exercise group. —> Control group 1 has very little to no change in increase in body mass that remains steady throughout the 6 weeks but control group 2’s change in body mass suddenly increases after the 2 weeks at a far greater rate than the other groups. The exercise group is the only group that experiences a decrease (after 4 weeks). The pectoralis mass of control 2 ended up being higher than that of control 1 or the exercise group.

2. Evaluate the claim that preventing exercise increases pectorals muscle mass. —> The claim seems valid enough because in both control groups (of which exercise was prevented), the pectoralis mass increased more than the exercise (control) group. The only setback could be the error bars but none of them overlap each other, indicating that the data is significant.

3. Suggest how the mass of the birds’ pectoralis muscle could be determined. —> Measuring the birds’ pectoralis muscle (ruler, tape measure) and calculating the volume of the weight then, or by simply weighing the bird before and after the experiment. Or if you’re really desperate, you could cut off the bird’s wing.

4. … Discuss the ethics of designing and carrying out experiments to test [this] hypothesis. —> By raising birds that don’t get to exercise or move as freely as they’d like, farmers are directly using birds for their own need, although that would be the birds’ purpose anyway. Animal rights activists might find a problem with this: the restriction of birds from living freely. However, the point of raising birds in a farm is to make them as big as possible before they are slaughtered and sold. While ethically it could feel like the exploitation of animals, the need to produce poultry still stands.

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