Nokea
The mean weight of 500 college students is 70 kg and the standard deviation is 3 kg. Assuming that the weight is normally distributed, determine how many students weigh more than 90 kg.
- B. 5
- C. 10
- D. 15
Correct Answer: A
Rationale: Z-score: (90-70)/3 = 6.67. P(Z > 6.67) is effectively 0 since it's far beyond the normal distribution's tail (P(Z < 6.67) ≈ 1), so 0 students, consistent with the document's calculation.
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Release of the mineralcorticoids is stimulated with:
- A. Low concentration of \mathrm{Na}+ in the blood
- B. Hypokalemia
- C. Low concentration of angiotensin II in the blood
- D. Low concentration of \mathrm{Mg} 2+ in the blood
Correct Answer: A
Rationale: Low blood sodium stimulates aldosterone release via the renin-angiotensin system.
A patient who has completed the first phase of a three-drug regimen for tuberculosis has a positive sputum acid-fast bacilli test. The nurse will tell the patient that
- A. drug resistance has probably occurred
- B. it may be another month before this test is negative
- C. the provider will change the pyrazinamide to ethambutol
- D. there may be a need to remain in the first phase of therapy for several weeks
Correct Answer: B
Rationale: Sputum negativity may take 2-3 months; positivity doesn't confirm resistance or prompt drug change . The goal is for the patient's sputum test to be negative 2 to 3 months after the therapy.
Patients prescribed aspirin therapy require education regarding the signs of aspirin toxicity. An early sign of aspirin toxicity is:
- A. Black tarry stools
- B. Vomiting
- C. Tremors
- D. Tinnitus
Correct Answer: D
Rationale: Tinnitus is an early aspirin toxicity sign; black stools or vomiting are later.
A nurse is assessing a client who has taken Procainamide to treat dysrhythmias for the last 12 months. The nurse should assess the client for which of the following adverse effects of this medication? (Select one that does not apply.)
- A. Joint swelling
- B. Widened QRS complex
- C. Narrowed QT interval
- D. Easy bruising
Correct Answer: C
Rationale: Procainamide can widen QRS , cause bruising from lupus-like syndrome, and joint swelling .
Drugs do not metabolize the same way in all people. For what patient would a nurse expect to assess for an alteration in drug metabolism?
- A. A 35-year-old woman with cervical cancer
- B. A 41-year-old man with kidney stones
- C. A 50-year-old man with cirrhosis of the liver
- D. A 62-year-old woman in acute renal failure
Correct Answer: C
Rationale: The liver is the most important site of drug metabolism. If the liver is not functioning effectively, as in patients with cirrhosis, drugs will not metabolize normally so that toxic levels could develop unless dosage is reduced. A patient with cervical cancer or kidney stones would not be expected to have altered ability to metabolize drugs so long as no liver damage existed. The patient with renal failure would have altered excretion of the drugs through the renal system but metabolism would not be impacted.