Anticholinergics are used in treating asthma because they:
a. Inhibit the production of secretions by blocking the effects of the parasympathetic nervous system
b. Stimulate bronchodilation through beta2 effects
c. Cause sympathetic activity by binding at cholinergic receptor sites
d. Relax bronchial muscle due to an effect similar to the xanthine bronchodilators
a
Rationale: a. Correct.
b. Sympathomimetics stimulate bronchodilation by stimulating beta2 receptors.
c. Anticholinergics block the effects of acetylcholine inhibiting the bronchial secretions.
d. Not true.
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The height of the hand grip of a walker is:
a. at the level of the finger tips. b. at the level of the metacarpophalangeal joints. c. with the elbow at approximately 45 degrees when gripping the walker. d. with the elbow at approximately 20 degrees when gripping the walker.
Which of these actions indicates that the EMT is correctly using a nonrebreather face mask on an adult patient?
A) He ensures that the reservoir fully collapses with each breath B) He instructs the patient to take deeper breaths when the mask is on C) He sets the oxygen flow rate to between 6 and 16 liters per minute D) He fully inflates the reservoir prior to placing the mask on the patient
Multiply the following: (+2)(-2)(+3)(+7)
A. -10 B. +10 C. +84 D. -84
What effect do propranolol and isoproterenol have on CI?
a. Both will decrease CI b. Propranolol will decrease CI; isoproterenol will increase CI c. Propranolol will increase CI; isoproterenol will decrease CI d. Both will increase CI