Nokea
Which of the following types of cells is the immune system's shutoff mechanism?
- A. Plasma cells
- B. Suppressor T cells
- C. Helper T cells
- D. B lymphocytes
Correct Answer: B
Rationale: Suppressor T cells, also known as regulatory T cells, play a critical role in regulating the immune response by acting as the immune system's shutoff mechanism. These cells help maintain immune tolerance and prevent overactivation of the immune system, thereby preventing autoimmune reactions and excessive inflammation. Suppressor T cells exert their immunosuppressive effects by inhibiting the function of other immune cells, such as effector T cells and B cells, and helping to control the overall balance of the immune system.
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The MOST appropriate advice for a 4-year-old child visiting the outpatient department with excessive crying is
- A. reassures her that this is a normal phenomenon
- B. seek more history regarding other skills and developmental domains
- C. refer her to pediatric psychiatry
- D. investigate for child abuse
Correct Answer: B
Rationale: Further history may help differentiate normal behavior from developmental concerns.
For a patient with gastroesophageal reflux symptoms, the purpose of esophageal pH monitoring is to evaluate for:
- A. esophagitis from the reflux.
- B. frequency of the reflux.
- C. gastric emptying delays.
- D. possible obstructions.
Correct Answer: B
Rationale: Esophageal pH monitoring measures the frequency and duration of acid exposure in the esophagus, helping diagnose GERD.
A nurse is planning a teaching session for parents of a newborn who plan to bottle-feed. Which should the nurse include in the teaching session? (Select all that apply.)
- A. Limiting the feeding to 15 minutes
- B. Propping the bottle for night feedings is acceptable
- C. Proper technique for cleansing the bottles and nipples
- D. Feeding infant on alternate sides of the lap
Correct Answer: C
Rationale: Proper technique for cleansing the bottles and nipples - It is essential to educate parents on the proper technique for cleaning bottles and nipples to prevent bacteria growth and ensure the newborn's milk is not contaminated.
You asked to obtain a measurement of serum sodium level in the hospital lab; you obtain a value of 125 mmol/L by repeating the test 5 times. The reference value of serum sodium at that lab is between 135-155 mmol/L. Your measurement is termed
- A. accurate but not precise
- B. precise but not accurate
- C. neither accurate nor precise
- D. both accurate and precise
Correct Answer: C
Rationale: The measurement is consistently low, indicating it is neither close to the true value (inaccurate) nor consistent with the reference range.
Which of the ff suggestions should a nurse give breastfeeding mothers to prevent or eliminate mastitis and breast abscess? Choose all that apply
- A. Offer the opposite breast at each feeding to their
- B. Avoid frequent nursing of the infants
- C. Avoid breastfeeding
- D. Ensure that their hands and breasts are clean
Correct Answer: D
Rationale: Keeping hands and breasts clean is crucial in preventing infections like mastitis and breast abscess. Proper hygiene practices can help reduce the risk of introducing harmful bacteria to the breast during breastfeeding. It is essential for breastfeeding mothers to wash their hands before each feeding session and ensure that the breast is clean before nursing.