Gas exchange occurs in which of the following structures?

bronchi

alveoli

nasal passages

larynx

Answer and Explanation

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.

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Correct Answer is D

Explanation

D. Duodenal ulcers are peptic ulcers that develop in the first part of the small intestine, known as the duodenum. They are the most common type of peptic ulcer. The classic symptom of a duodenal ulcer is intermittent upper abdominal pain that occurs about 2 to 3 hours after eating, particularly meals that contain acidic or spicy foods. The pain often wakes the patient from sleep and is relieved by eating or taking antacids.
A. Decubitus ulcers, also known as pressure ulcers or bedsores, are caused by prolonged pressure on the skin, typically over bony prominences. They occur due to impaired blood flow and tissue damage, often in individuals who are bedridden or immobile.
B. Gastric ulcers are peptic ulcers that develop in the lining of the stomach. While gastric ulcers can cause upper abdominal pain, they typically occur shortly after eating or during meals, rather than 3 hours after eating or at night.
C. Esophageal ulcers are peptic ulcers that develop in the lining of the esophagus. They are relatively rare compared to gastric and duodenal ulcers. Esophageal ulcers can cause symptoms such as chest pain, difficulty swallowing, and heartburn, but they are not typically associated with the timing of symptoms described by the client.

A. "I will hold my breath at least 10 seconds after inhaling the medication." B. "I will wait 10 min between each inhalation." C. "I will hold the inhaler with my non-dominant hand." D. "I will tilt my head forward while inhaling the medication."

Correct Answer is A

Explanation

A. Holding the breath for at least 10 seconds after inhaling the medication allows the medication to settle in the lungs and increases its effectiveness. This ensures maximum delivery of the drug to the respiratory tract.
B. The recommended time to wait between inhalations is typically around 1 to 2 minutes, not 10 minutes. Waiting too long between puffs may reduce the effectiveness of the medication and is not necessary.
C. There is no specific recommendation that the inhaler must be held with the non-dominant hand. The inhaler should be held in the hand that feels most comfortable and provides the best control, which is usually the dominant hand for most people.
D. The correct technique involves tilting the head slightly back to open the airway, making it easier for the medication to reach the lungs. Tilting the head forward could restrict the airflow and reduce the effectiveness of the inhalation.

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Gas exchange occurs in which of the following structures?

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Naxlex Comprehensive Predictor Exams

Your client has told you that they have been experiencing intermittent upper abdominal pain about 3 hours after eating and at times will even be awaken in the middle of the night by this pain. You suspect that your client may have which type of peptic ulcer?

Correct Answer is D

Explanation

A nurse is reinforcing discharge teaching with a client following an episode of status asthmaticus. The client has a prescription for two inhalations from an albuterol metered-dose inhaler. Which of the following statements by the client indicates an understanding of the teaching?

Correct Answer is A

Explanation

43. A nurse is reinforcing teaching about use of a metered-dose inhaler (MDI) with a client who has a new diagnosis of asthma. Identify the sequence the client should follow. (Move the steps into the box on the right, placing them in the selected order of performance. Use all steps.)

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