Ryanair Conversion 4 Practice Test

Hypoxia worsens as oxygen supply drops, and the brain shows increasingly clear signs as it becomes more deprived. Early on you might not notice much, or you feel only mild effects. As it advances, symptoms like headaches, fatigue, blurred vision, poor coordination, and noticeable changes in personality reflect substantial brain involvement and impaired mental function. Those signs point to advanced hypoxia, not mild or normal conditions, and they signal that oxygen levels are critically reduced but not yet at the point of unconsciousness seen in severe hypoxia.