What is the leading cause of death among adults over the age of 40 in the United States?
a. Chronic pulmonary disease
b. Sudden cardiac arrest
c. Motor vehicle trauma
d. Airway obstruction
ANS: B
Sudden cardiac arrest (SCA) is the leading cause of death in many parts of the world.
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A 56-year-old man is complaining of chest pain without respiratory distress. His vital signs show a blood pressure of 146/88, pulse 88, and pulse oximetry reading of 97percent. How should you treat this patient?
A) Administer oxygen via nonrebreather at 15 liters per minute. B) Provide oxygen via bag-valvemask at 15 liters per minute. C) Assure that his airway is secure and monitor his respiratory status. D) Assist the patient with his metered dose inhaler.
Changes in vitamin B12 are most dramatic in tissues with the greatest rate of cell turnover because:
A. Deficiencies result in impaired RNA synthesis in any cell where chromosomal replication and division takes place. B. Deficiencies result in impaired excretion of metabolic waste products from the cells' cytosol. C. Deficiencies result in impaired function of cytochrome P450. D. Deficiencies result in impaired DNA synthesis in any cell where chromosomal replication and division takes place.