Your 14-year-old son suffers from asthma. The condition usually worsens in the early spring when the plants are pollinating. He carries a rescue inhaler to help him when he starts to have trouble breathing. The active ingredient in the inhaler is albuterol, which is a beta-2 agonist. Why would albuterol be a good choice as a rescue medication? What is its mechanism?   A. A beta-2 agonist will trigger the release of acetylcholine and dilate the bronchioles. B. A beta-2 agonist will bind to beta-2 receptors and mimic the sympathetic nervous system actions on the bronchioles. C. A beta-2 agonist will bind to beta-2 receptors and block the sympathetic nervous system actions on the bronchioles. D. A beta-2 agonist stimulates the release of norepinephrine and epinephrine from the adrenal medulla.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Your 14-year-old son suffers from asthma. The condition usually worsens in the early spring when the plants are pollinating. He carries a rescue inhaler to help him when he starts to have trouble breathing. The active ingredient in the inhaler is albuterol, which is a beta-2 agonist. Why would albuterol be a good choice as a rescue medication? What is its mechanism?
 
A. A beta-2 agonist will trigger the release of acetylcholine and dilate the bronchioles.
B. A beta-2 agonist will bind to beta-2 receptors and mimic the sympathetic nervous system actions on the bronchioles.
C. A beta-2 agonist will bind to beta-2 receptors and block the sympathetic nervous system actions on the bronchioles.
D. A beta-2 agonist stimulates the release of norepinephrine and epinephrine from the adrenal medulla.
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