Question

The mountaineers carry the oxygen with them because.
A) At an altitude of more than 5 km, there is no air
B) The amount of air available to the person is less than that available on the ground
C) The temperature of the air is higher than that on the ground
D) The pressure of air is higher than that on the ground

Answer 1

Hint: Mountaineers carry oxygen cylinders with them when they climb on the mountains of high altitude. Oxygen cylinders are used to store oxygen to maintain the supply of oxygen in emergency conditions.

Complete Answer:
1) When we move towards the higher altitude the level of oxygen decreases. In other words, we can say the atmospheric pressure is lesser than that of the ground level.
2) The reason behind carrying the oxygen is when they climb mountains, as altitude increases, the amount of oxygen level in the atmospheric air decreases as there are no trees found on the higher altitude to supply the oxygen. In such a case, mountaineers suffer from dizziness because of hypoxia.
3) To avoid such issues arising due to insufficient oxygen, mountaineers carry oxygen cylinders.

So, ‘The amount of the air available to the person is less than that available on the ground’ is the correct answer.

Note: Hypoxia is a medical condition when there is no sufficient supply of oxygen at the tissue level. Hypoxia can be broadly categorized into four different types such as:
- Hypoxic hypoxia
- Hypemic hypoxia
- Stagnant hypoxia
- Histotoxic hypoxia

Anxiety, shortness of breath, restlessness and confusion are some primary signs of hypoxia. If hypoxia is not treated well, then there is a great possibility of hypotension developing in the patient. Extreme hypoxia also can lead to death, if not treated immediately.