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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 64 kg or less.
- A. 5
- B. 11
- C. 15
- D. 20
Correct Answer: B
Rationale: P(X ≤ 64) equals P(X < 64) in a continuous distribution since P(X=64) = 0. From the previous calculation, P(Z < -2) ≈ 0.0228, so 0.0228 * 500 ≈ 11, consistent with the document.
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Which of these beta-blockers is a Class III antiarrhythmic agent?
- A. Metoprolol
- B. Esmolol
- C. Sotalol
- D. Bucindolol
Correct Answer: C
Rationale: Sotalol has both beta-blocking and potassium channel-blocking (Class III) properties, prolonging the action potential.
As an antacid, sodium bicarbonate has the following disadvantages EXCEPT:
- A. It causes acid rebound
- B. In ulcer patients, it increases risk of perforation
- C. It has low acid neutralizing capacity
- D. It is contraindicated in CHF
Correct Answer: C
Rationale: Sodium bicarbonate has high acid-neutralizing capacity, but it causes acid rebound, risks perforation in ulcers due to gas production, and is contraindicated in CHF due to sodium load.
A nurse in a provider's office is reviewing the medical record of a client who is pregnant and is at her first prenatal visit. Which of the following immunizations may the nurse administer safely to this client?
- A. Varicella vaccine
- B. Rubella vaccine
- C. Inactivated influenza vaccine
- D. Measles vaccine
Correct Answer: C
Rationale: Inactivated influenza vaccine is safe in pregnancy; live vaccines (A, B, D) are contraindicated.
An important concept taught by the nurse when providing medication teaching is the need to provide a complete list of medications taken to health care providers to avoid what?
- A. Spending large amounts of money on medications
- B. Allergic reactions to medications
- C. Drug-drug interactions
- D. Critical concentrations of medications in the body
Correct Answer: C
Rationale: It is important that all health care providers have a complete list of the patient's medications to avoid drug-drug interactions caused by one provider ordering a medication, unaware of another medication the patient is taking that could interact with the new prescription. Using the same pharmacist for all prescriptions will also help to prevent this from happening. Informing the provider of all medications taken will not reduce costs of medications, which is best accomplished by requesting generic medications. Allergies should be disclosed to all health care providers as well, but this is not why it is important to provide a complete list of medications taken. Critical concentrations are desirable because that is the amount of drug needed to cause a therapeutic effect, or, in other words, to have the effect the drug is prescribed for.
During what phase of the nursing process would the nurse be required to consider the efficacy of nursing interventions related to drug therapy?
- A. Assessment
- B. Nursing diagnosis
- C. Interventions
- D. Evaluation
Correct Answer: D
Rationale: Evaluation assesses the effectiveness of interventions, including drug therapy outcomes, to determine if goals are met.