Identify the mechanism of action of the anticholinergic drug agents used to treat asthma.
A. By blocking the actions of acetylcholine, anticholinergic drugs produce bronchodilation and also increase the volume of respiratory secretions.
B. By blocking the actions of acetylcholine, anticholinergic drugs produce bronchodilation and also reduce the volume of respiratory secretions.
C. By blocking the actions of acetylcholine, anticholinergic drugs produce bronchoconstriction and also increase the volume of respiratory secretions.
D. None of these are correct.
Answer: B
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