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 B
Explanation
B. Severe upper abdominal pain is a hallmark symptom of gastrointestinal perforation. Perforation can lead to the leakage of gastric contents into the peritoneal cavity, causing intense, sharp pain in the upper abdomen. The pain may be sudden and severe and can radiate to the back or shoulders.
A. Bradycardia, or a slow heart rate, is not typically associated with gastrointestinal perforation. Instead, tachycardia (rapid heart rate) is more commonly observed due to the body's response to shock or inflammation caused by perforation.
C. Hyperactive bowel sounds are more commonly associated with conditions such as gastroenteritis or bowel obstruction. In the case of gastrointestinal perforation, bowel sounds may initially be normal but can eventually become absent due to peritoneal irritation and subsequent paralytic ileus.
D. Epigastric fullness may be present in peptic ulcer disease but is not a specific manifestation of gastrointestinal perforation. Perforation is more likely to present with severe, acute pain rather than a sensation of fullness.
Correct Answer is A, B, C, D, E
Explanation
A. Shake the canister 3 to 5 seconds vigorously.
Before each use, it's important to shake the MDI to ensure proper mixing of the medication.
B. Place her lips firmly around the mouthpiece.
Creating a tight seal around the mouthpiece ensures that the medication is delivered directly into the airways.
C. Inhale slowly over 3 to 5 seconds while pushing down on the canister.
While pressing down on the canister, the client should inhale slowly to allow the medication to reach the lungs.
D. Hold her breath for 10 seconds.
After inhaling the medication, holding the breath for 10 seconds allows for better absorption of the medication into the lungs.
E. Exhale slowly through pursed lips.
After holding the breath, exhaling slowly through pursed lips helps to fully exhale and ensures that the medication remains in the airways.
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