Final answer:
Hypoxia is the condition that may result from inadequate oxygen supply due to various factors affecting respiration or circulation.
Step-by-step explanation:
The condition that may occur as a result of inadequate O2 in the air, disease of the respiratory system, dysfunction of the neuro system, or alterations in circulatory function is Hypoxia. Hypoxia is characterized by an insufficient supply of oxygen to the body's tissues, which can lead to symptoms such as fatigue, headaches, and confusion. Conditions that impair respiratory functions can lead to hypercapnia, which is the presence of abnormally elevated carbon dioxide (CO2) levels in the blood. Conversely, hypocapnia refers to abnormally low CO2 levels, which can occur with excessive ventilation (hyperventilation).