Physiology & Biochemistry · single question
Increased mucus secretion in acute asthma is caused by:
Show answer and explanation
Correct answer: A. Acetylcholine release
Cholinergic (muscarinic) signaling drives bronchoconstriction and mucus in asthma.
- A. Correct. Parasympathetic (vagal) acetylcholine acts on muscarinic receptors → bronchoconstriction and increased mucus.
- B. Sympathetic NE/epinephrine causes bronchodilation, the opposite effect.
- C. Not the primary mediator of asthmatic mucus secretion.
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