Certified Transport Registered Nurse Certification Practice Exam

Which of the following best defines hypoxia?

1. Excess oxygen in the blood

2. Lack of oxygen supply to the tissues

3. Too much carbon dioxide in the body

4. Overactive respiratory rate

The correct answer is: Lack of oxygen supply to the tissues

Hypoxia is best defined as a lack of adequate oxygen supply to the tissues of the body. This condition can result from various factors, including impaired oxygen delivery or utilization at the cellular level. When tissues do not receive enough oxygen, they are unable to perform their normal functions, which can lead to cellular damage and affect overall organ function. In contrast, excess oxygen in the blood pertains to a different condition known as hyperoxia, which is not the same as hypoxia. Similarly, elevated carbon dioxide levels in the body indicate another type of respiratory issue, often referred to as hypercapnia, and an overactive respiratory rate can indicate a variety of conditions but does not inherently imply a lack of oxygen to tissues. Understanding the specific definition of hypoxia is crucial for recognizing its clinical significance and implications in patient care.