Which of the following are possible theories explaining how theophylline works? 1. Inhibits phosphodiesterase 2. Blocks acetylcholine 3. Blocks adenosine 4. Produces catecholamines 5. None of the above
a. 1, 2, and 3 only
b. 1, 3, and 4 only
c. 1, 2, 3, and 4 only
d. 5 only
ANS: B
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How is dose area product usually specified?
a. In coulomb per kilogram b. In ergs per gram c. In subunits of millisievert d. In units of mGy-cm2
H1-receptor antagonists (antihistamines) should be used cautiously in patients with asthma and which of the following?
A) hypertension B) hyperthyroidism C) hypotension D) hypothermia
A 50-year-old woman who is conscious and alert complains of a severe migraine headache. When caring for her, you should generally avoid:
A) shining a light into her pupils. B) transporting her in a supine position. C) dimming the lights in the ambulance. D) applying ice packs to her forehead.
The stress?strain curve is formulated by comparing the
a. density of a tissue after being under stress to its original density. b. elasticity of a tissue after being under stress to its original elasticity. c. length of a tissue after being under stress to its original length. d. viscosity of a tissue after being under stress to its original viscosity.