Certified Transport Registered Nurse Certification Practice Exam

What is hypoxic hypoxia primarily characterized by?

1. Lack of oxygen in the atmosphere

2. Insufficient blood circulation

3. Blood loss or anemia

4. Inability of blood to carry oxygen effectively

The correct answer is: Lack of oxygen in the atmosphere

Hypoxic hypoxia is primarily characterized by a lack of oxygen in the atmosphere, which leads to a reduced availability of oxygen in the blood and subsequently to tissues. This type of hypoxia occurs when there is insufficient ambient oxygen, making it difficult for the body to obtain the necessary amount of oxygen to meet its metabolic demands. This condition is commonly experienced at high altitudes, where atmospheric pressure is lower, thereby reducing the concentration of oxygen available for breathing. While other types of hypoxia, such as stagnant hypoxia or anemic hypoxia, can be caused by factors like poor blood circulation or reduced hemoglobin levels, hypoxic hypoxia is distinct in that its primary cause is the deficiency of oxygen in the environment itself. Thus, recognizing the environmental conditions that contribute to hypoxic hypoxia is crucial for understanding its implications and management in clinical settings.