Nursing Elites

1. Around what age do children typically start to develop 'stranger anxiety'?

• A. 9 months
• B. 6 months
• C. 3 months
• D. 12 months

Correct answer: B

Rationale: The correct answer is '6 months.' At around this age, children typically start to develop 'stranger anxiety' as they become more aware of unfamiliar faces and may start showing signs of distress or anxiety around strangers. At 3 months, infants are still very young and unlikely to display stranger anxiety. While by 9 or 12 months, children have usually already developed some level of stranger anxiety, it typically starts around 6 months, making it the most appropriate answer in this context.

2. An adult client tells the clinic nurse that he is susceptible to middle ear infections. About which risk factor related to infection of the ears does the nurse question this client?

• A. Loud music
• B. Use of power tools
• C. Occupational noise
• D. Exposure to cigarette smoke

Correct answer: D

Rationale: The correct answer is 'Exposure to cigarette smoke.' Otitis media (middle ear infection) is associated with various factors like colds, allergies, sore throats, and blockage of the eustachian tubes. Risk factors include exposure to cigarette smoke, youth (as otitis media is usually a childhood disease), congenital abnormalities, immune deficiencies, family history of otitis media, recent upper respiratory infections, and allergies. Choices A, B, and C (Loud music, Use of power tools, and Occupational noise) are more likely to cause hearing loss rather than being direct risk factors for middle ear infections.

3. What causes an older female client's hair to turn gray?

• A. ''A loss of melanin occurs in the normal aging process.''
• B. ''The number of sweat glands and blood vessels decreases in the normal aging process.''
• C. ''The skin on the scalp becomes thin, causing moisture to escape.''
• D. ''It is caused by hereditary factors.''

Correct answer: A

Rationale: The correct answer is 'A loss of melanin occurs in the normal aging process.' Graying hair in older adults is primarily due to a decrease in the number of melanocytes responsible for providing pigment and hair color. This reduction in melanin production leads to gray hair. The other choices are incorrect. While it is true that the skin becomes thinner with aging and the number of sweat glands and blood vessels decreases, these changes are not directly related to graying hair. Additionally, hereditary factors can influence when graying starts, but they do not cause the graying of hair itself.

4. An adult client undergoes various diagnostic tests to determine the pumping ability of the heart. The nurse notes that the results of these tests indicate that the client's cardiac output is 5 L/min. The nurse makes which conclusion?

• A. The client has a low cardiac output.
• B. The client has a high cardiac output.
• C. The client has a normal cardiac output.
• D. The client will need a blood transfusion.

Correct answer: C

Rationale: A cardiac output of 5 L/min falls within the normal range for a resting adult, which typically ranges between 4 and 6 L/min. Cardiac output is calculated as the stroke volume (volume of blood in each systole) multiplied by the heart rate. Therefore, a cardiac output of 5 L/min is considered normal. Choices A and B are incorrect as they misinterpret the result as either low or high, which is not the case based on the provided information. Choice D is unrelated to the client's cardiac output and thus incorrect.

5. How often should the intravenous tubing on total parenteral nutrition solutions be changed?

• A. every 24 hours
• B. every 36 hours
• C. every 48 hours
• D. every 72 hours

Correct answer: A

Rationale: The correct answer is to change the intravenous tubing on total parenteral nutrition solutions every 24 hours. This frequency is necessary due to the high risk of bacterial growth associated with TPN solutions. Changing the tubing every 24 hours helps prevent contamination and bloodstream infections. Choices B, C, and D are incorrect because waiting longer intervals increases the risk of introducing harmful bacteria into the patient's system, leading to potentially severe complications.

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