a. What evidence do you have that bone is living tissue?
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b. Why would you expect persons with stronger muscles to have stronger bones?
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c. Bones have all sorts of grooves and protuberances. What purpose might they have?
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d. The female pelvis is wider than the male pelvis. With what might this be associated?
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2. A muscle fiber obeys the all-or-none law-that is, it contracts or it doesn't contract.
a. Therefore, do all myofibrils in a muscle fiber contract at the same time?
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b. When a sarcomere contracts, does the Z line move? If so, in which direction?
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c. A respiratory pigment in muscle called myoglobin receives oxygen (O2) from hemoglobin. Which of these two respiratory pigments has the higher affinity for oxygen?
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d. When we exercise, blood brings more oxygen to the muscles. What do the muscles specifically do with all this oxygen?
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