Nokea
The organs of the respiratory zone of the respiratory system include all the following EXCEPT:
- A. trachea
- B. small bronchioles
- C. alveoli ducts
- D. alveoli
Correct Answer: A
Rationale: The correct answer is A: trachea. The trachea is not part of the respiratory zone, which is where gas exchange occurs. The respiratory zone includes the small bronchioles, alveoli ducts, and alveoli. The trachea is part of the conducting zone, which is responsible for transporting air to and from the respiratory zone. Therefore, the trachea is not directly involved in gas exchange, making it the correct answer. The other choices, B: small bronchioles, C: alveoli ducts, and D: alveoli, are all part of the respiratory zone and play a crucial role in gas exchange.
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What is the relationship between the pressures at label '8'?
- A. P outside = P inside
- B. P outside > P inside
- C. P outside < P inside
- D. P outside + P inside
Correct Answer: C
Rationale: The correct answer is C: P outside < P inside. This is because pressure decreases as altitude increases. At label '8', the pressure outside the object (presumably at a higher altitude) is lower than the pressure inside the object. This is due to the decrease in air pressure with increasing altitude. Choice A is incorrect because at higher altitudes, the pressure outside is lower than inside. Choice B is incorrect as it suggests the opposite relationship. Choice D is incorrect as it does not accurately describe the relationship between the pressures at label '8'.
The most common preventive drug therapy for tuberculosis is:
- A. Prednisone.
- B. Isoniazid.
- C. Gamma globulin.
- D. Aminophylline.
Correct Answer: B
Rationale: The correct answer is B: Isoniazid. Isoniazid is the most common preventive drug therapy for tuberculosis due to its effectiveness in treating latent TB infections. It works by killing the bacteria that cause TB. Prednisone is a steroid and not used as a preventive therapy for TB. Gamma globulin is used for immune deficiency disorders, not TB prevention. Aminophylline is a bronchodilator used for asthma, not TB prevention. In summary, isoniazid is the preferred choice for TB prevention due to its specific antimycobacterial action, while the other options are unrelated or ineffective for this purpose.
When obtaining a health history from a 76-year-old patient with suspected CAP, what does the nurse expect the patient or caregiver to report?
- A. Confusion
- B. An abrupt onset of fever and chills
- C. A recent loss of consciousness
- D. A gradual onset of headache and sore throat
Correct Answer: B
Rationale: In patients with Community-Acquired Pneumonia (CAP), an abrupt onset of fever and chills is a common symptom to expect. This is due to the rapid inflammatory response in the lungs. Confusion, loss of consciousness, and gradual headache and sore throat are less likely to be reported initially.
The nurse on the intermediate care unit received a change-of-shift report on four patients with hypertension. Which patient should the nurse assess first?
- A. 48-yr-old with a blood pressure of 160/92 mm Hg who reports chest pain
- B. 52-yr-old with a blood pressure of 198/90 mm Hg who has leg cramping
- C. 50-yr-old with a blood pressure of 190/104 mm Hg who has a creatinine of 1.1 mg/dL
- D. 43-yr-old with a blood pressure of 172/98 mm Hg whose urine shows microalbuminuria.
Correct Answer: A
Rationale: The correct answer is A. The nurse should assess the 48-yr-old with a blood pressure of 160/92 mm Hg who reports chest pain first because chest pain can be a sign of a cardiac issue, which could be life-threatening. Assessing this patient first is crucial to rule out any acute cardiac events. Leg cramping (choice B) is a common symptom in hypertensive patients but is not as urgent as chest pain. High creatinine levels (choice C) may indicate kidney issues but do not require immediate assessment compared to chest pain. Microalbuminuria (choice D) is a sign of kidney damage in hypertension but does not pose an immediate threat like chest pain.
Which of the following lymphocytes are involved in innate immunity?
- A. natural killer (NK) cells
- B. plasma cells
- C. CD8 T cells
- D. B memory cells
Correct Answer: A
Rationale: Natural killer (NK) cells are involved in innate immunity as they are able to directly kill virus-infected cells and tumor cells without prior sensitization. They are part of the body's first line of defense against infections. Plasma cells, CD8 T cells, and B memory cells are all part of adaptive immunity, which involves a specific response to pathogens and requires prior exposure. Therefore, they are not involved in innate immunity.