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Author Question: Which factor stimulates the carotid and aortic chemoreceptors? a. High carbon dioxide levels b. ... (Read 99 times)

mydiamond

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on: Jul 16, 2018
Which factor stimulates the carotid and aortic chemoreceptors?
 
  a. High carbon dioxide levels
  b. High oxygen (O2) levels
  c. High pH levels
  d. High 2,3-DPG levels

Question 2

Which of the following would have a negative impact on cardiac contractility? 1. Acidosis 2. Digitalis 3. Hypoxia 4. Norepinephrine
 
  a. 1, 2, and 3
  b. 2 and 4 only
  c. 4 only
  d. 1 and 3 only


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mochi09

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

ANS: A
They are strongly stimulated by decreased O2 tensions, although low pH or high levels of carbon dioxide also can increase their discharge rate.

Answer to Question 2

ANS: D
Profound hypoxia and acidosis impair myocardial metabolism and decrease cardiac contractility.


mydiamond

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Reply #2 on: Jul 16, 2018
Thank you


mochi09

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Reply #3 on: Jul 16, 2018
No problemo


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