The term that is used for the pressure of each gas in a mixture of gases is:
Air pressure
Complement pressure
Gas concentration pressure
Partial pressure
The Correct Answer is D
A. Air pressure refers to the total pressure exerted by the mixture of gases in the atmosphere, but it does not refer to the pressure of each individual gas.
B. Complement pressure is not a standard term in respiratory physiology or gas laws.
C. Gas concentration pressure is not a recognized term. The pressure exerted by a gas is referred to as its partial pressure, not its concentration.
D. Partial pressure refers to the pressure exerted by an individual gas in a mixture of gases. For example, the partial pressure of oxygen (pO₂) in the blood is the pressure exerted by oxygen alone, independent of other gases like carbon dioxide or nitrogen
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. The cerebral cortex is involved in higher brain functions like thinking and voluntary control of breathing but does not contain central chemoreceptors.
B. Central chemoreceptors are located in the medulla oblongata, a part of the brain stem. They detect changes in the pH of cerebrospinal fluid, which reflects CO₂ levels in the blood, and help regulate breathing accordingly.
C. The aorta contains peripheral chemoreceptors, not central ones. These aortic bodies monitor blood oxygen, carbon dioxide, and pH, but they are outside the central nervous system.
D. The cerebellum coordinates motor control and balance and does not play a role in chemoreception.
Correct Answer is B
Explanation
A. Esophagus passes through the mediastinum and lies posterior to the trachea and heart.
B. Lungs are not part of the mediastinum; they are located in the pleural cavities on either side of the mediastinum.
C. Heart is located centrally within the mediastinum, specifically in the middle mediastinum.
D. Lymph nodes are present in the mediastinum and are part of the immune and lymphatic systems
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