QuestionSBA
QuestionChoice
B1 adrenergic receptors are responsible for heart rate and myocardial contraction. Stimulating B1 receptors would not lead to bronchodilation, and as such are not used for the management of asthma.
10004823
c
B1 agonists
QuestionChoice
B2 adrenergic receptor stimulation leads to vasodilation and bronchodilation. B2 antagonists lead to adverse effects if used in asthmatics.
10004822
b
B2 antagonists
QuestionChoice
B1 adrenergic receptors are responsible for heart rate and myocardial contraction. Stimulating or blocking B1 receptors would not lead to bronchodilation, and as such are not used for the management of asthma.
10004825
e
B1 antagonists
QuestionChoice
Asthma is a type of obstructive lung disease characterised by airway bronchoconstriction as a result of inflammation of the airways. First-line treatment is a short-acting inhaled B2 agonist such as salbutamol. B2 adrenergic receptor stimulation leads to vasodilation and bronchodilation.
10004821
a
B2 agonists
QuestionChoice
A1 adrenergic receptors are responsible for systemic vascular tone and vasoconstriction. Stimulating these receptors leads to an increase in cardiac output. A1 adrenergic receptors are not involved in bronchodilation, and as such, are not used for asthma management.
10004824
d
A1 agonists
Concept
Chapter
2693
3725
Asthma
Topic
132
Respiratory
13511
A 6-year-old girl presents to her GP with chest tightness, laboured breathing and a wheeze. Spirometry shows an obstructive picture. The GP rightly suspects this is asthma.

Which of the following options correctly describes the mechanism of action of pharmacological agents used in this condition?
a