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 between 60 kg and 75 kg.
- A. 450
- B. 476
- C. 480
- D. 490
Correct Answer: B
Rationale: Convert to z-scores: (60-70)/3 = -3.33, (75-70)/3 = 1.67. P(-3.33 < Z ≤ 1.67) = P(Z ≤ 1.67) - P(Z ≤ -3.33) = 0.9525 - (1 - 0.9996) = 0.9521. Then, 0.9521 * 500 ≈ 476, as per the document.
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Patients with cystic fibrosis are often prescribed enzyme replacement for pancreatic secretions. Each replacement drug has lipase, protease, and amylase components, but the drug is prescribed in units of:
- A. Lipase
- B. Protease
- C. Amylase
- D. Pancreatin
Correct Answer: A
Rationale: Pancreatic enzymes are dosed by lipase units, targeting fat malabsorption in cystic fibrosis.
Which statement is not correct about rosiglitazon:
- A. Enhance insulin production by pancreatic beta cells
- B. Increase senstivitiy towards insulin
- C. Increase uptake of glucose by tissues
Correct Answer: A
Rationale: Rosiglitazone increases insulin sensitivity, not insulin production, via PPAR-gamma activation.
The burn client is receiving treatments of topical mafenide acetate (Sulfamylon) to the site of injury. The nurse monitors the client, knowing that which of the following indicates that a systemic effect has occurred?
- A. Hyperventilation
- B. Elevated blood pressure
- C. Local pain at the burn site
- D. Local rash at the burn site
Correct Answer: A
Rationale: Mafenide acetate is a carbonic anhydrase inhibitor and can suppress renal excretion of acid, thereby causing acidosis. Clients receiving this treatment should be monitored for signs of an acid-base imbalance (hyperventilation). If this occurs, the medication should be discontinued for 1 to 2 days. Options 3 and 4 describe local rather than systemic effects. An elevated blood pressure may be expected from the pain that occurs with a burn injury.
Regular intake of small amount of ethanol may
- A. Increase HDL level and LDL oxidation
- B. Decrease HDL level and LDL oxidation
- C. Increase HDL level and decrease LDL oxidation
- D. Decrease synthesis of VLDL
Correct Answer: C
Rationale: Moderate ethanol intake is known to increase HDL (good cholesterol) levels and reduce LDL oxidation, offering some cardiovascular benefit.
Which of the following is true about procainamide and its dosing schedule?
- A. It produces bradycardia and should be used cautiously in patients with cardiac conditions that a slower heart rate might worsen.
- B. Gastrointestinal adverse effects are common so the drug should be taken with food.
- C. Adherence can be improved by using a sustained release formulation that can be given once daily.
- D. Doses of this drug should be taken evenly spaced around the clock to keep an even blood level.
Correct Answer: D
Rationale: Even spacing maintains steady procainamide levels.