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Week 1 Discussion 1.A weightlifter who practices five hours a day observes that his muscles have gotten larger. He tells you that his muscle cells are dividing and consequently making him stronger, so he can lift more weight. Is his explanation correct? Why or why not? His explanation is incorrect because when doing forceful repetitive training like weight lifting, the number of muscle cells don’t increase but rather the production of myofibrils, mitochondria, sarcoplasmic reticulum and other organelles within the cell. Over all they enlarge existing muscle cell but the number of cells doesn’t increase. This is a process called muscle hypertrophy. 2.The meat of chicken breasts is considered white meat, whereas chicken legs and thighs are made up of dark meat. However, the breast and leg meat of migrating ducks are composed of dark meat. The breasts of chickens and ducks are used in flying. How can you explain the differences in color of the muscle meat? How are theyadapted for their particular functions? Be sure to use proper terminology when