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Author Question: A patient is experiencing respiratory difficulty and retaining too much carbon dioxide. Which ... (Read 78 times)

dmcintosh

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on: Jun 25, 2018
A patient is experiencing respiratory difficulty and retaining too much carbon dioxide. Which receptor sites would be stimulated in an attempt to maintain a normal homeostatic state?
 
  a. Irritant
  b. Stretch
  c. Peripheral
  d. Central

Question 2

One of the functions of the pulmonary system is the:
 
  a. expelling of bacteria.
  b. exchange of gases between the environ-ment and blood.
  c. movement of blood into and out of the capillaries.
  d. principal mechanism for cooling of the heart.


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yotaSR5

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Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Chemoreceptors monitor arterial blood indirectly by sensing changes in the pH of cerebrospinal fluid (CSF). The central chemoreceptors are sensitive to very small changes in the pH of CSF and can maintain a normal PaCO2. Irritant receptors sense the need to expel unwanted substances. Stretch receptors decrease ventilatory rate and volume when stimulated. The peripheral chemo-receptors become the major stimulus to ventilation when the central chemoreceptors are reset.

Answer to Question 2

ANS: B
The pulmonary system promotes exchange of gases between the environment and the blood. Neither expelling bacteria, moving blood in and out of the capillaries, nor cooling of the heart is considered a function of the pulmonary system.


dmcintosh

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Reply #2 on: Jun 25, 2018
Thank you


yotaSR5

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Reply #3 on: Jun 25, 2018
No problemo


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