Nokea
Hemoglobin
- A. tends to release oxygen under warmer temperatures
- B. picks up more oxygen the higher its partial pressure.
- C. picks up more oxygen when it is saturated
- D. will give up oxygen when the partial pressure of oxygen is higher than it is in the lungs.
Correct Answer: B
Rationale: The correct answer is B because hemoglobin follows the principle of partial pressure, which states that gases move from areas of higher partial pressure to lower partial pressure. Therefore, hemoglobin will pick up more oxygen when the partial pressure of oxygen is higher, such as in the lungs. Choice A is incorrect because hemoglobin actually releases oxygen at higher temperatures. Choice C is incorrect because hemoglobin picks up oxygen when it is not fully saturated. Choice D is incorrect because hemoglobin releases oxygen when the partial pressure of oxygen is higher, not when it is lower.
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Residual volume in lungs of an average human is
- A. 500 ml
- B. 3-4.5 ml
- C. 1000 ml
- D. 1500 ml
Correct Answer: D
Rationale: The correct answer is D (1500 ml) because residual volume refers to the amount of air left in the lungs after maximal exhalation, which is around 1200-1500 ml in an average human. This volume is necessary to keep the alveoli inflated and prevent lung collapse. Choices A (500 ml), B (3-4.5 ml), and C (1000 ml) are incorrect because they do not accurately represent the typical residual volume in the lungs of an average human. Choice A is too low, choices B and C are significantly below the actual range of residual volume.
Blessy, a community health nurse is conducting an educational session with community members regarding tuberculosis. The nurse tells the group that one of the first symptoms associated with tuberculosis is:
- A. Dyspnea
- B. Chest pain
- C. A bloody, productive cough.
- D. Bronchoscopy
Correct Answer: B
Rationale: The correct answer is B: Chest pain. Chest pain can be one of the first symptoms of tuberculosis due to inflammation of the lung tissue or pleura. Dyspnea (A) typically occurs in later stages as the disease progresses. A bloody, productive cough (C) is a common symptom of tuberculosis but may not be one of the first symptoms. Bronchoscopy (D) is a diagnostic procedure and not a symptom of tuberculosis. In summary, chest pain is a common initial symptom due to lung inflammation, while the other choices are either later symptoms or unrelated diagnostic procedures.
Phrenic nerve are
- A. in diaphragmatic area
- B. at c3 to c5
- C. Both A and B
- D. non
Correct Answer: C
Rationale: The phrenic nerve innervates the diaphragm and arises from cervical nerve roots C3 to C5. Choice C is correct as it accurately states that the phrenic nerve is located in the diaphragmatic area and originates from C3 to C5. Choice A is incorrect as it only mentions the diaphragmatic area without specifying the cervical levels. Choice B is incorrect as it only mentions the cervical levels without specifying the diaphragmatic area. Choice D is incorrect as the phrenic nerve does exist.
A patient with a lung mass found on chest x-ray is undergoing further testing. The nurse explains that a diagnosis of lung cancer can be confirmed using which diagnostic test?
- A. Lung tomograms
- B. Pulmonary angiography
- C. Biopsy done via bronchoscopy
- D. Computed tomography (CT) scans
Correct Answer: C
Rationale: A biopsy done via bronchoscopy is a common method to confirm a diagnosis of lung cancer by obtaining tissue samples for analysis.
Miriam, a college student with acute rhinitis sees the campus nurse because of excessive nasal drainage. The nurse asks the patient about the color of the drainage. In acute rhinitis, nasal drainage normally is:
- A. Yellow
- B. Green
- C. Clear
- D. Gray
Correct Answer: C
Rationale: The correct answer is C: Clear. In acute rhinitis, the nasal drainage is typically clear because it is caused by viral infections or allergies, which result in clear mucus production. Yellow or green drainage may indicate a bacterial infection, which is not typically associated with acute rhinitis. Gray drainage is uncommon in nasal discharge and may suggest a more serious underlying condition. Therefore, the nurse asked about the color of the drainage to assess the nature of the infection and determine the appropriate course of treatment.