Anatomy Ch 10

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Author:
brice9
ID:
66669
Filename:
Anatomy Ch 10
Updated:
2011-02-16 00:43:05
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Online hw review
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Description:
Ch 10 exam 2
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  1. Muscle contraction is caused by
    • a. actin filaments sliding past each other.
    • b. myelin filaments sliding past each other.
    • c. myosin filaments sliding past each other.
    • d. actin filaments sliding past myelin filaments.
    • e. actin filaments sliding past myosin filaments




    correct:e
  2. Which of the following statements about H zones and I bands is TRUE?
    • a. the H zones contain only myosin, while the I bands contain only actin
    • b. the H zones contain only actin, while the I bands contain only myosin
    • c. the H zones contain only myosin, while the I bands contain both actin and myosin
    • d. the H zones contain both actin and myosin, while the I bands contain only actin
    • e. the H zones and the I bands each contain both actin and myosin




    correct: a
  3. During muscle contraction
    • a. the A band remains the same and the I band narrows.
    • b. the I band remains the same and the A band narrows.
    • c. both the A band and I band remain the same.
    • d. both the A band and I band narrow.
    • e. both the A band and I band become wider.

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