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 exactly 64 kg.
- B. 5
- C. 10
- D. 15
Correct Answer: A
Rationale: In a continuous normal distribution, the probability of an exact value (e.g., P(X=64)) is 0, as probability is measured over intervals, not points. Thus, 0 students, as per the document.
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The ganglion blocking drugs act by
- A. Competing with acetylcholine at neuromuscular junctions
- B. Preventing release of acetylcholine
- C. Preventing nerve conduction in post ganglionic segment
- D. Preventing catecholamine release or inactivating it
Correct Answer: B
Rationale: Ganglion blockers (e.g., hexamethonium) prevent acetylcholine release at ganglia.
A characteristic that distinguishes true receptors from other drug binding sites present in blood and other biological tissues is the characteristic of:
- A. binding affinity
- B. reversible binding
- C. signal transduction
- D. stereoselective interaction
Correct Answer: B
Rationale: Reversible binding is a key feature of true receptors, distinguishing them from non-specific binding sites like plasma proteins.
A nurse is providing teaching to a client who is starting Simvastatin. Which of the following information should the nurse include in the teaching?
- A. Take this medication in the evening.
- B. Change position slowly when rising from a chair.
- C. Maintain a steady intake of green leafy vegetables.
- D. Consume no more than 1 L/day of fluid
Correct Answer: A
Rationale: Simvastatin is taken in the evening when cholesterol synthesis peaks.
When documenting, which of the following would be appropriate for the nurse to use at accredited health care organizations? Select one that does not apply.
- A. IU
- B. 2mg
- C. 0.2 mg
- D. Units
Correct Answer: A
Rationale: Always use a leading zero when writing decimals (i.e., 0.2 mg, not .2 mg) and leave off the trailing zero (i.e., 2 mg, not 2.0 mg). Always write out units, international units, and daily; do not use U, IU, or QD.
Oral rehydration solution has been employed in following EXCEPT:
- A. Severe vomiting
- B. Burn cases
- C. Heat stroke
- D. Diarrhoea
Correct Answer: A
Rationale: Oral rehydration solution (ORS) is used in diarrhea, burns, and heat stroke to replace fluids and electrolytes, but severe vomiting limits its effectiveness due to inability to retain it.