Many contrast media contain ____.
A. calcium
B. iodine
C. petroleum
D. lead
E. hydrogen peroxide
B. iodine
Contrast media may contain iodine compounds, gases, heavy metal salts, or paramagnetic compounds.
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Sildenafil (Viagra) achieves its therapeutic action in the treatment of erectile dysfunction by:
A) enhancing neuronal stimulation of the amygdala in the brain. B) stimulating parasympathetic receptors in the nerve fibers leading to the sexual organs. C) stimulating sympathetic receptors in the nerve fibers leading to the sexual organs. D) relaxing vascular smooth muscle, which increases blood flow to the corpus cavernosum.
Median rhomboid glossitis is a chronic white and/or red lesion occurring in the midline dorsum of the tongue anterior to the circumvallate papillae that is believed to be caused by:
a. Epstein-Barr virus b. Herpes simplex virus c. Autoantibodies d. Smokeless tobacco products e. None of the above
Signs of anxiety include all of the following except:
a. diaphoresis b. comfort c. hyperventilation d. tachycardia
Which of the following does the anterior cruciate ligament prevent?
A. Posterior movement of the femur during weight bearing B. Varus stress C. Anterior movement of the femur during weight bearing D. Valgus stress