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Author Question: Which of the following centers responds more strongly to high levels of CO2? a. Aortic ... (Read 15 times)

mp14

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on: Jul 16, 2018
Which of the following centers responds more strongly to high levels of CO2?
 
  a. Aortic chemoreceptors
  b. Carotid chemoreceptors
  c. Central chemoreceptors
  d. Ventral respiratory centers

Question 2

In the face of hyperoxia, what is the response of the peripheral chemoreceptors to hypercapnia?
 
  a. There is a decreased drive to breathe.
  b. There is an increased drive to breathe.
  c. There is insufficient information.
  d. There is virtually no response.


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tmlewis4706

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

ANS: C
For a given increase in PaCO2 or hydrogen ion concentration, the carotid bodies are less respon-sive than the central chemoreceptors. The peripheral chemoreceptors account for only 20 to 30 of the ventilatory response to hypercapnia.

Answer to Question 2

ANS: D
High arterial PO2 (hyperoxia) decreases the peripheral chemoreceptors' PCO2 sensitivity to al-most zero.


mp14

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Reply 2 on: Jul 16, 2018
Excellent

AmberC1996

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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