Question

When $O_2$ concentration in blood increases, breathing becomes

• A. Shallower and slow
• B. There is no effect on breathing
• C. Slow and deep
• D. Faster and deeper

Answer 1

The correct option is C Slow and deep

Hyperoxia is a condition characterized by very high levels of oxygen in the blood. In this situation, breathing will become short and deeper, the individual will notice tightness in the chest, difficulty in breathing and shortness of breath.
In cases where oxygen intoxication is very high, there could be oxidative damage to the cells, deflation of alveoli in the lungs, retinal detachment, and seizures. This kind of toxicity can be managed by reducing exposure to elevated levels of oxygen. If supplementation of oxygen is continued long enough, the result can be fatal due to lack of oxygen.
Therefore, the correct answer is option C.