Gas exchange occurs in which of the following structures?
bronchi
alveoli
nasal passages
larynx
The Correct Answer is B
B. The alveoli are tiny air sacs within the lungs where gas exchange occurs. Oxygen from inhaled air diffuses across the thin walls of the alveoli into the bloodstream, while carbon dioxide moves from the bloodstream into the alveoli to be exhaled.
A. The bronchi are the main airways that branch off from the trachea and lead to the lungs. While the bronchi play a crucial role in conducting air to and from the lungs, gas exchange does not occur in the bronchi themselves.
C. The nasal passages, also known as the nostrils or nares, are the passages through which air enters the respiratory system. While the nasal passages warm, humidify, and filter the air as it enters the body, gas exchange does not occur in this area.
D. The larynx, or voice box, is located at the top of the trachea and is involved in breathing, swallowing, and vocalization. However, gas exchange does not occur in the larynx.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
C. Persistent shortness of breath after using an inhaler could indicate an inadequate response to treatment or worsening asthma exacerbation. The nurse should therefore see this patient first.
A. In COPD patients pulse oximetry oxygen saturations of more than 90% are acceptable. In the treatment of exacerbations of chronic obstructive pulmonary disease (COPD), oxygen should be titrated to achieve a target oxygen saturation range of 88-92%. This results in a greater than twofold reduction in mortality, compared with the routine administration of high-concentration oxygen therapy.
B. Administering antibiotics can be prioritized, but it may not require immediate attention compared to addressing acute respiratory distress or hypoxemia.
D. Collecting a sputum specimen for laboratory analysis is important for diagnosing and managing respiratory infections, but it may not be as time-sensitive as addressing acute respiratory distress or hypoxemia.
Correct Answer is C
Explanation
C. Monitoring blood sugar levels regularly, as recommended by the doctor, is crucial for managing type 2 diabetes effectively. It helps patients track their glucose levels, identify patterns, and make informed decisions about medication, diet, and lifestyle choices to maintain optimal blood sugar control.
A. Drinking orange juice to treat high blood sugar is not recommended because it can cause a rapid increase in blood sugar levels due to its high sugar content. Instead, patients should focus on consuming foods or beverages with lower glycemic index values and more stable glucose responses.
B. Regular physical activity is an essential component of diabetes management as it helps improve insulin sensitivity, lower blood sugar levels, control weight, and reduce the risk of complications. Patients with diabetes are encouraged to engage in regular exercise as part of their overall treatment plan.
D. Eating a diet high in carbohydrates can lead to spikes in blood sugar levels, which can be detrimental for individuals with type 2 diabetes. Instead, patients are encouraged to follow a balanced diet that includes a variety of nutrient-rich foods, with a focus on whole grains, lean proteins, healthy fats, fruits, and vegetables, while moderating carbohydrate intake.
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