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Author Question: Both anemia and carbon monoxide (CO) poisoning can cause severe hypoxia, yet neither condi-tion ... (Read 100 times)

APUS57

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on: Jul 16, 2018
Both anemia and carbon monoxide (CO) poisoning can cause severe hypoxia, yet neither condi-tion results in a major stimulation of breathing. Why is this so?
 
  a. The peripheral chemoreceptors do not re-spond to low O2 content.
  b. Anemia and CO poisoning depresses the peripheral chemoreceptors.
  c. Anemia and CO poisoning depresses the central chemoreceptors.
  d. Anemia and CO cause stagnant hypoxia, not hypoxemia.

Question 2

Where are the peripheral chemoreceptors located? 1. In the arch of the aorta 2. In the bifurcations of carotid arteries 3. On the ventrolateral surfaces of the medulla
 
  a. 1 and 2 only
  b. 2 only
  c. 2 and 3 only
  d. 1 and 3 only


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nyrave

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
Because of their extremely high blood-flow rates, the carotid bodies respond to decreased arterial partial pressure of O2 rather than to an actual decrease in arterial O2 content.

Answer to Question 2

ANS: A
Peripherally located chemoreceptors are found in the fork of the common carotid arteries and the aortic arch.


APUS57

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Reply #2 on: Jul 16, 2018
Thank you


nyrave

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Reply #3 on: Jul 16, 2018
No problemo


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