Which of the following conditions would be least likely to result in hypoxia?

• A. Obstruction of the respiratory airways
• B. Severe anemia reducing hemoglobin levels
• C. Increased oxygen availability in the environment
• D. Impaired diffusion of oxygen across the alveolar membrane

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the concept of hypoxia. Hypoxia refers to a condition where there is insufficient oxygen reaching the tissues of the body. It can result from various factors such as reduced oxygen availability, impaired oxygen transport, or issues with oxygen utilization.
2. Step 2: Analyze each condition provided in the problem. For example, obstruction of the respiratory airways can limit the amount of oxygen entering the lungs, leading to hypoxia. Severe anemia reduces hemoglobin levels, which are essential for oxygen transport in the blood, also potentially causing hypoxia.
3. Step 3: Consider the condition of impaired diffusion of oxygen across the alveolar membrane. This can occur due to damage or disease affecting the lungs, reducing the efficiency of oxygen transfer from the air into the bloodstream, which can lead to hypoxia.
4. Step 4: Evaluate the condition of increased oxygen availability in the environment. This scenario provides more oxygen for the body to utilize, making it the least likely to result in hypoxia compared to the other conditions listed.
5. Step 5: Conclude that increased oxygen availability in the environment is the least likely condition to result in hypoxia, as it enhances the oxygen supply rather than limiting it.