Altitude Sickness Occurs When a Hiker Ascends to Altitudes Where

question 50

Multiple Choice

Altitude sickness occurs when a hiker ascends to altitudes where the density of oxygen is low. Carbonic anhydrase inhibitors cause less movement of carbonic acid toward carbon dioxide production and are used as a prophylactic treatment of altitude sickness. How does this treatment decrease the symptoms of high altitude sickness?

• A) The resulting rise in pH increases respiration rate.
• B) Excess bicarbonate ions are excreted in the urine and the resulting loss of blood pressure increases respiration rate.
• C) An increase in blood acidity leads to an increase in ventilation.
• D) An increase in bicarbonate ions in the blood stimulates the production of more red blood cells.
• E) The excess bicarbonate ions in the blood increase the affinity of hemoglobin for oxygen.

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