Question
0n high mountains, difficulty in breathing is due to
decrease in partial pressure of O2
decrease in amount of O2
increase in CO2 concentration
all of the above
Solution
A.
decrease in partial pressure of O2
When the partial pressure of oxygen is higher in the atmosphere the haemoglobin readily binds with it (at approx 100mmHg. The pressure of oxygen lungs) and tries to release oxygen and attain relaxed conformation when pressure decreases below 40mmHg(The pressure oxygen in tissue).
At high mountain, the pressure of oxygen is low so a large volume of air is required by haemoglobin to attain a relaxed state.
