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Biology

Visual Connection Questions

BiologyVisual Connection Questions
1.

Figure 38.19 Which of the following statements about bone tissue is false?

  1. Compact bone tissue is made of cylindrical osteons that are aligned such that they travel the length of the bone.
  2. Haversian canals contain blood vessels only.
  3. Haversian canals contain blood vessels and nerve fibers.
  4. Spongy tissue is found on the interior of the bone, and compact bone tissue is found on the exterior.
2.

Figure 38.37 Which of the following statements about muscle contraction is true?

  1. The power stroke occurs when ATP is hydrolyzed to ADP and phosphate.
  2. The power stroke occurs when ADP and phosphate dissociate from the myosin head.
  3. The power stroke occurs when ADP and phosphate dissociate from the actin active site.
  4. The power stroke occurs when Ca2+ binds the calcium head.
3.

Figure 38.38 The deadly nerve gas Sarin irreversibly inhibits acetycholinesterase. What effect would Sarin have on muscle contraction?

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