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 less than 64 kg.
- A. 5
- B. 11
- C. 15
- D. 20
Correct Answer: B
Rationale: Z-score: (64-70)/3 = -2. P(Z < -2) = 1 - P(Z ≤ 2). Using standard tables, P(Z ≤ 2) ≈ 0.9772, so P(Z < -2) = 1 - 0.9772 = 0.0228 (document says 0.02128, likely a typo). Then, 0.0228 * 500 ≈ 11, matching the document.
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A nurse is instructing a pregnant patient concerning the potential risk to her fetus from a Pregnancy Category B drug. What would the nurse inform the patient?
- A. Adequate studies in pregnant women have demonstrated there is no risk to the fetus.
- B. Animal studies have not demonstrated a risk to the fetus, but there have been no adequate studies in pregnant women.
- C. Animal studies have shown an adverse effect on the fetus, but there are no adequate studies in pregnant women.
- D. There is evidence of human fetal risk, but the potential benefits from use of the drug may be acceptable despite potential risks.
Correct Answer: B
Rationale: Category B indicates that animal studies have not demonstrated a risk to the fetus. However, there have not been adequate studies in pregnant women to demonstrate risk to a fetus during the first trimester of pregnancy and no evidence of risk in later trimesters. Category A indicates that adequate studies in pregnant women have not demonstrated a risk to the fetus in the first trimester or in later trimesters. Category C indicates that animal studies have shown an adverse effect on the fetus, but no adequate studies in humans. Category D reveals evidence of human fetal risk, but the potential benefits from the use of the drugs in pregnant women may outweigh potential risks.
The NP orders a thyroid panel for a patient on amiodarone. The patient tells the NP that he does not have thyroid disease and wants to know why the test is ordered. Which is a correct response?
- A. Amiodarone inhibits an enzyme that is important in making thyroid hormone and can cause hypothyroidism.
- B. Amiodarone damages the thyroid gland and can result in inflammation of that gland, causing hyperthyroidism.
- C. Amiodarone is a broad-spectrum drug with many adverse effects. Many different tests need to be done before it is given.
- D. Amiodarone can cause corneal deposits in up to 25% of patients.
Correct Answer: A
Rationale: Amiodarone inhibits thyroid hormone synthesis, risking hypothyroidism.
Which of the following sign/symptom would NOT be expected from organophosphate poisoning?
- A. Dry skin and mucous membranes
- B. Increased salivation
- C. Increased bowel sounds
- D. Urinary urgency
Correct Answer: A
Rationale: Organophosphates cause wet symptoms (salivation, etc.); dry skin is typical of anticholinergics.
According to the 2003-2006 National Health and Nutrition Examination Survey study of dietary intake, the group at highest risk for inadequate calcium intake was:
- A. The elderly (over age 60 years)
- B. Teenage females
- C. Teenage males
- D. Preschoolers
Correct Answer: B
Rationale: Teenage females are at high risk for inadequate calcium intake due to dietary habits and growth demands.
A nurse is caring for a client who states she has been taking Phenylephrine nasal drops for the past 10 days for Sinusitis. The nurse should assess the client for which of the following adverse effects of this medication?
- A. Sedation
- B. Nasal congestion
- C. Productive cough
- D. Constipation
Correct Answer: B
Rationale: Prolonged phenylephrine use can cause rebound nasal congestion due to vasoconstrictor overuse.