The genetic reference to a person with a normal level of ...

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The genetic reference to a person with a normal level of 1-antitrypsin is _____ phenotype.
 
  a. Z
  b. MZ
  c. MM
  d. ZZ

Question 2

The respiratory therapist is evaluating a patient in the intensive care unit who shows signs of tissue hypoxia. Laboratory results reveal the following: HgB 14.8 grams, CaO2 19.6 vol. , PaO2 102 mm Hg, a-v difference 9.8 vol. , PvO2 24 mm Hg.
 
  Based on these results, which of the following types of hypoxia does this patient have?
  a. Hypoxic hypoxia
  b. Anemic hypoxia
  c. Circulatory hypoxia
  d. Histotoxic hypoxia

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Answer to Question 1

C
Individuals who have the genetic phenotype MM (or M phenotype) have normal levels 1-antitrypsin.

Answer to Question 2

C
An increase in the a-v difference is due to a decrease in cardiac output (circulatory hypoxia). The cardiac output and a-v difference are inversely related, and an a-v difference of 9.9 vol.  is evidence of the inadequacy of the cardiac output.