Question

Which of the following would NOT be involved in causing bronchiolar constriction during an asthma attack?

A) acetylcholine
B) central nervous system
C) peripheral nervous system
D) adrenal medulla

Answer 1

Bronchiolar constriction during an asthma attack is primarily caused by the release of acetylcholine from the parasympathetic nervous system.

Step-by-step explanation:

During an asthma attack, bronchiolar constriction is primarily caused by the release of acetylcholine from the parasympathetic nervous system. This neurotransmitter acts on muscarinic receptors located on smooth muscles in the bronchioles, causing them to contract and narrow the airways. The central nervous system and peripheral nervous system play a role in regulating the activity of the parasympathetic and sympathetic nervous systems, respectively. However, the adrenal medulla is not directly involved in bronchiolar constriction during an asthma attack.