Oxygen will diffuse out of blood during the phase of respiration called:
External exchange of gases
Pulmonary ventilation
Internal exchange of gases
None of the answers are correct
The Correct Answer is C
A. The external exchange of gases refers to the process of oxygen diffusing from the alveoli into the blood and carbon dioxide diffusing from the blood into the alveoli in the lungs. This occurs during pulmonary ventilation.
B. Pulmonary ventilation involves the movement of air in and out of the lungs (breathing), not the exchange of gases.
C. The internal exchange of gases refers to the diffusion of oxygen from the blood to the tissues and carbon dioxide from the tissues to the blood. This happens at the cellular level throughout the body.
D. This answer is incorrect because internal exchange of gases is the correct phase for oxygen to diffuse out of the blood.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. The septum refers to the nasal septum, which divides the nasal cavity into two nostrils. It is not part of the pharynx.
B. The oropharynx is located below the nasopharynx and serves as a passage for both air and food. It is not the most superior portion of the pharynx.
C. The nasopharynx is the most superior portion of the pharynx, located behind the nasal cavity and above the soft palate. It is primarily involved in the passage of air from the nasal cavity to the rest of the respiratory system.
D. The laryngeal pharynx (or hypopharynx) is the portion of the pharynx below the oropharynx, just above the larynx, and it
Correct Answer is A
Explanation
A. Hemoglobin is an iron-containing protein found in red blood cells. It binds to oxygen in the lungs and carries it through the bloodstream to tissues throughout the body.
B. Antigens are substances that can trigger an immune response, but they are not involved in carrying oxygen in the blood.
C. Albumin is a protein in the blood that helps maintain osmotic pressure and transports various substances, but it does not carry oxygen.
D. Bicarbonate ions are involved in carbon dioxide transport in the blood, not oxygen. They help regulate the pH of blood and facilitate CO₂ transport from tissues to the lungs.
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