Nokea
Carbon dioxide and water combine to form
- A. hydrochloric acid
- B. oxygen
- C. carbonic acid
- D. carbaminohemoglobin
Correct Answer: C
Rationale: The correct answer is C: carbonic acid. When carbon dioxide and water combine, they form carbonic acid through a chemical reaction known as hydration. This process is essential for the transportation of carbon dioxide in the blood and plays a crucial role in maintaining the body's pH balance. Hydrochloric acid (A) is formed by the reaction of hydrogen chloride gas with water. Oxygen (B) is not a product of the reaction between carbon dioxide and water. Carbaminohemoglobin (D) is a compound formed by the binding of carbon dioxide to hemoglobin in red blood cells, not a direct product of the reaction between carbon dioxide and water.
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With respect to regional gas exchange in the upright lung
- A. Ventilation is greater at the top of the lungs
- B. Perfusion is much greater at the top of the lungs compared with the bases
- C. Ventilation/perfusion ratio is abnormally high at the top of the lungs
- D. PO2 is highest at the bases of the lungs
Correct Answer: C
Rationale: The correct answer is C because in the upright lung, the ventilation-perfusion ratio is higher at the top due to gravity causing increased perfusion at the bases. This results in a mismatch between ventilation and perfusion, leading to a higher V/Q ratio at the top. Choices A and B are incorrect because ventilation is actually greater at the bases due to the effect of gravity, leading to higher ventilation there. Choice D is incorrect because PO2 is higher at the apex of the lung due to decreased perfusion but not at the bases.
The nurse is caring for a 30-year-old American Indian female who is taking Rifater, a drug
containing rifampin, isoniazid, and pyrazinamide. The patient asks how long she will have to
take the medication. Which response explains when the patient may discontinue the
medication?
- A. When the sputum culture comes back negative.
- B. When the medication has been taken for 9 months
- C. When three consecutive sputum cultures are negative
- D. When the tuberculin skin test (TST) is no longer positive
Correct Answer: C
Rationale: The correct answer is C: When three consecutive sputum cultures are negative. This indicates successful treatment completion and eradication of the tuberculosis infection. A negative sputum culture confirms that the patient is no longer infectious and can safely discontinue the medication.
Choice A is incorrect because a single negative sputum culture does not guarantee complete eradication of the infection. Choice B is incorrect as the standard treatment duration for tuberculosis is typically 6-9 months, but discontinuation should be based on sputum culture results. Choice D is incorrect as the TST can remain positive even after successful treatment, as it reflects exposure to the tuberculosis bacteria, not active infection status.
You are the team leader RN working with a student nurse. The student nurse is to teach the client how to use a multidose inhaler without a spacer. Put the steps that the student nurse should teach the client in correct order.
- A. Remove the inhaler cap and shake the inhaler.
- B. Tilt your head back and breathe out fully.
- C. Press down firmly on the canister and breathe deeply through your mouth.
- D. Wait at least 1 minute between puffs.
Correct Answer: D
Rationale: The correct order is: A (remove cap and shake), B (tilt head back and breathe out), C (press down and breathe in), D (wait between puffs). This sequence ensures proper inhaler technique.
A nurse is assessing a client who is recovering from a lung biopsy. The client's breath sounds are absent. While another nurse calls the Rapid Response Team
- A. what action by the nurse takes is most important?
- B. Take a full set of vital signs.
- C. Obtain pulse oximetry reading.
- D. Ask the patient about hemoptysis.
Correct Answer: B
Rationale: The correct answer is B, taking a full set of vital signs, as it is crucial in assessing the client's overall condition and detecting any signs of deterioration. Vital signs include blood pressure, heart rate, respiratory rate, and temperature, which provide valuable information about the client's cardiovascular and respiratory status. In this scenario, absent breath sounds indicate potential respiratory compromise, making it essential to monitor vital signs for any signs of respiratory distress or instability.
Choice A is incorrect because calling the Rapid Response Team is important, but assessing the client's vital signs should take priority to provide immediate information on the client's condition. Choice C, obtaining pulse oximetry reading, is also important but may not provide a comprehensive assessment of the client's overall condition compared to a full set of vital signs. Choice D, asking about hemoptysis, is not the most urgent action to take in this situation as assessing vital signs would provide more immediate and critical information for the client's management.
which component of pharynx received the Eustachian tube
- A. oropharynx
- B. laryngopharynx
- C. Nasopharynx
- D. none of these
Correct Answer: C
Rationale: The correct answer is C: Nasopharynx. The Eustachian tube connects the middle ear to the nasopharynx, allowing for pressure equalization. The oropharynx (A) and laryngopharynx (B) do not directly receive the Eustachian tube. Choice D is incorrect as the Eustachian tube does connect to a specific part of the pharynx.