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Home Q & A Board Biology-Related Homework Help Cell Biology
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Goose7701 Goose7701
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6 years ago
If a physician hears two lub sounds instead of one, then which of the following conditions is true?
  a. The semilunar valves are not closing simultaneously.
  b. The atrial blood is flowing backward and causing the extra sound.
  c. The atrioventricular valves are not closing at the same time.
  d. The AV and semilunar valves are not closing at the same time.
  e. No such double sound has ever been heard.

Question 2

What occurs during systole?
  a. Oxygen-rich blood is pumped to the lungs.
  b. The heart muscle tissues contract.
  c. The atrioventricular valves suddenly open.
  d. Oxygen-poor blood from all body regions except the lungs flows into the right atrium.
  e. The heart muscle tissues relax.
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dexter54dexter54
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6 years ago
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Goose7701 Author
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6 years ago
Upwards Arrow All were right, you're seriously the best
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