MN551 Midterm quiz QUESTIONS AND ANSWERS

MN551 Midterm quiz QUESTIONS AND ANSWERS A nurse practitioner employed in the emergency department admits a patient who has experienced severe frostbite to his hands and toes after becoming lost on a ski trail. The NP recognizes that which of the following phenomena has caused the tissue damage? (Points : 2) Decreased blood viscosity has resulted in interstitial bleeding. Reactive vasodilation has compromised perfusion. Autonomic nervous stimulation has resulted in injury. Decreased blood flow has induced hypoxia. Question 2.2. A 6-year-old boy has been brought to the emergency department by ambulance after his mother discovered that his heart rate was “so fast I couldn't even count it.” The child was determined to be in atrial flutter and his mother is seeking an explanation from the health care team. Which of the following points should underlie an explanation to the mother? (Points : 2) The child is experiencing a reentry rhythm in his right atrium. The resolution of the problem is dependent on spontaneous recovery and is resistant to pacing interventions. The child is likely to have a normal ECG apart from the rapid heart rate. The boy's atria are experiencing abnormal sympathetic stimulation. Question 3.3. A 14-year-old boy has been diagnosed with infectious mononucleosis. Which of the following pathophysiological phenomena is most responsible for his symptoms? (Points : 2) The Epstein-Barr virus (EBV) is lysing many of the boy's neutrophils. Viruses are killing some of his B cells and becoming incorporated into the genomes of others. The EBV inhibits the maturation of white cells within his peripheral lymph nodes. The virus responsible for mononucleosis inhibits the maturation of myeloblasts into promyelocytes.