Respiratory Physiology and Clinical Laboratory Tests Quiz
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Questions and Answers

Which of the following sets of changes best describes a Himalayan native living in the Himalayas compared to a sea-level native living at sea level?

  • Hematocrit increased, Arterial PO2 decreased, Arterial PO2 decreased (correct)
  • Hematocrit increased, Arterial PO2 increased, Arterial PO2 decreased
  • No difference in any parameter
  • Hematocrit decreased, Arterial PO2 decreased, Arterial PO2 increased
  • What is the alveolar PO2 of the aviator (in mmHg)?

  • 139
  • 99
  • 43 (correct)
  • 75
  • Before traveling to a higher altitude with acetazolamide use, what would be the expected response?

  • Normal ABG
  • Alkalotic blood
  • Elevated ventilation (correct)
  • Normal ventilation
  • Regarding a healthy recreational scuba diver at a depth of 66 ft in the Philippine Sea, which of the following statements is true?

    <p>Increased risk of decompression sickness at that depth</p> Signup and view all the answers

    What is the typical tonicity of the tubular fluid passing through the lumen of the early distal tubule near the macula densa?

    <p>Hypertonic</p> Signup and view all the answers

    What change would you expect in the inulin clearance per plasma concentration ratio in a man at rest with severe prostatic obstruction?

    <p>It will decrease</p> Signup and view all the answers

    Which of the following is an expected change in a dehydrated person deprived of water for 24 hours?

    <p>Increased plasma atrial peptide concentration</p> Signup and view all the answers

    In which nephron segment is magnesium reabsorption primarily occurring?

    <p>Ascending limb of loop of Henle</p> Signup and view all the answers

    In a 26-year-old man with glomerulonephritis and a 50% decrease in GFR, which substance would have the greatest increase in plasma concentration?

    <p>PAH</p> Signup and view all the answers

    What is the expected response in terms of blood pH for a person planning to leave sea level and travel to higher altitude?

    <p>Alkalotic blood</p> Signup and view all the answers

    What would be the anticipated change in ventilation for a person planning to ascend to 14,500 ft?

    <p>Increased ventilation</p> Signup and view all the answers

    During recreational scuba diving at 66 ft in the Philippine Sea, what is true about a healthy diver's arterial PO2?

    <p>Decreased PO2</p> Signup and view all the answers

    How would acetazolamide affect the kidneys before a person's trip to a higher altitude?

    <p>Increased bicarbonate excretion</p> Signup and view all the answers

    What change would be observed in hematocrit levels in a Himalayan native compared to a sea-level native?

    <p>Increased hematocrit</p> Signup and view all the answers

    In an aviator breathing 100% oxygen, what would be the expected alveolar PO2 based on the provided information?

    <p>139</p> Signup and view all the answers

    For a healthy recreational scuba diver at a depth of 66 ft, what change occurs in arterial PO2?

    <p>Decreased arterial PO2</p> Signup and view all the answers

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