Medical MCQ - The following acute respiratory response to ascent to high altitude, there is normalization of blood pH. The mechanism is

The following acute respiratory response to ascent to high altitude, there is normalization of blood pH. The mechanism is

Increased erythropoesis leads to increased buffering by hemoglobin

Increased excretion of HCO3 - by the kidneys

Increased levels of 2, 3--DPG

Retention of bicarbonate by the kidneys

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Correct Answer:

Retention of bicarbonate by the kidneys

Description:

The lung response to acute altitude exposure is mainly hyperventilation which, together with elevated hea rate, aims at achieving an adequate supply of oxygen to the tissues. At rest, ventilation increases by firstly increasing the tidal volume, at least up to 3500 m. Ref: guyton and hall textbook of medical physiology 12 edition page number:365,376,377

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