Nokea
The following statements about immunoglobulins are false:
- A. IgG is not transferable across the placenta
- B. IgM is usually a pentamer
- C. IgE levels are raised in parasitic infestations
- D. IgD is important in antibody dependent cytotoxicity
Correct Answer: A
Rationale: IgG is not transferable across the placenta: IgG is the only immunoglobulin that crosses the placenta to provide passive immunity to the fetus.
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A child has been seen by the school nurse for dizziness since the start of the school term. It happens when standing in line for recess and homeroom. The child now reports that she would rather sit and watch her friends play hopscotch because she cannot count out loud and jump at the same time. When the nurse asks her if her chest ever hurts, she says yes. Based on this history, the nurse suspects that she has:
- A. Ventricular septal defect (VSD)
- B. Aortic stenosis (AS)
- C. Mitral valve prolapse
- D. Tricuspid atresia
Correct Answer: B
Rationale: AS can progress and result in exercise intolerance, which may improve with rest.
The nurse is closely monitoring the intake and output of an infant with heart failure who is receiving diuretic therapy. The nurse should use which most appropriate method to assess urine output?
- A. Inserting a foley catheter.
- B. Weighing the diapers.
- C. Comparing intake with output.
- D. Measuring the amount of water added to the formula.
Correct Answer: B
Rationale: Weighing diapers is a non-invasive and accurate method to assess urine output in infants, which is crucial for monitoring the effectiveness of diuretic therapy.
A child is undergoing remission induction therapy to treat leukemia. Allopurinol is included in the regimen. The main reason for administering allopurinol as part of the client’s chemotherapy regimen is to:
- A. Prevent metabolic breakdown of xanthine to uric acid
- B. Prevent uric acid from precipitating in the ureters
- C. Enhance the production of uric acid to ensure adequate excretion of urine
- D. Ensure that the chemotherapy doesn’t adversely affect the bone marrow
Correct Answer: A
Rationale: Allopurinol prevents the breakdown of xanthine to uric acid, reducing the risk of uric acid nephropathy during chemotherapy-induced tumor lysis.
Which among the following is a correct description for the condition 'mitral arcade'?
- A. Absent chordal insertions
- B. Absent papillary muscles
- C. Fused papillary muscles
- D. Elongated papillary muscles
Correct Answer: C
Rationale: Mitral arcade is characterized by fused papillary muscles.
An infant is experiencing dyspnea related to patent ductus arteriosus (PDA). What does the nurse understand regarding why dyspnea occurs?
- A. Blood is circulated through the lungs again, causing pulmonary circulatory congestion.
- B. Blood is shunted past the pulmonary circulation, causing pulmonary hypoxia.
- C. Blood is shunted past cardiac arteries, causing myocardial hypoxia.
- D. Blood is circulated through the ductus from the pulmonary artery to the aorta, bypassing the left side of the heart.
Correct Answer: A
Rationale: When PDA is present, oxygenated blood recycles through the lungs, overburdening the pulmonary circulation.