What would NOT be a symptom of hypoxia?

In the context of hypoxia, which is a deficiency in the amount of oxygen reaching the tissues, the correct choice is the one that identifies a condition that would not occur as a result of low oxygen levels. Enhanced cognitive function is not a symptom of hypoxia, as the lack of oxygen typically leads to impaired brain function rather than improvement.

When the body is deprived of adequate oxygen, various physiological responses occur. For example, drowsiness and shortness of breath are common symptoms as the body struggles to obtain more oxygen. Furthermore, the heart tends to work harder to compensate for the reduced oxygen availability, resulting in an increased heart rate. Therefore, under conditions of hypoxia, cognitive function deteriorates, making "enhanced cognitive function" an unlikely symptom, while the other symptoms listed are indeed reflective of the body's responses to low oxygen levels.