Which of the following occurs at 10-12% oxygen concentration?

At an oxygen concentration of 10-12%, individuals typically experience increased heart rate and impaired judgment. This range of oxygen is significantly below normal atmospheric levels, which can lead to mild hypoxia. As the body struggles to acquire adequate oxygen, the heart rate increases in an attempt to deliver more oxygen to vital organs. Concurrently, cognitive functions, such as judgment, begin to decline as the brain becomes deprived of necessary oxygen—even at these levels.

Understanding the physiological responses to varying levels of oxygen concentration is crucial for recognizing the signs of hypoxia and its impacts on the body. Such awareness is especially important for those operating in environments where oxygen levels may be compromised.