What is the name of the following cardiac arrhythmia?
a. Paroxysmal atrial tachycardia c. Premature ventricu-lar contractions
b. Atrial premature depolarization d. Wolff-Parkinson-White syndrome
ANS: C
The two premature ventricular contractions shown are characterized by the absence of a P wave, wide QRS complexes, and a lack of T waves.
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Which of the following is true regarding the form or function of the alveoli?
A) The alveoli permit gas exchange between the lungs and bloodstream. B) The alveoli are thin walled and covered by smooth muscle. C) The alveoli are air passages that permit ventilation of the lung. D) The alveoli are covered with small arteries that allow gas exchange.
Death from ______ is the second leading cause of mortality in the United States, and approximately 115,000 cases of _______ injury are treated each year
A. firearms, firearm B. stabbing, stabbing C. trauma, trauma D. motor vehicle accident, motor vehicle accident