QuestionSBA
QuestionChoice
Salbutamol is a short acting beta-2 agonist (SABA) that acts on the beta-2 receptors on bronchiole smooth muscle to cause dilation. They have little effect on bronchial hyperreactivity and are used to mediate bronchospasm.
10026795
a
Beta 2 receptor agonist
QuestionChoice
Administration of a beta-2 receptor antagonist (or Beta blocker) would lead to increased pulmonary resistance and worsen the effects of an asthma attack.
10026796
b
Beta 2 receptor antagonist
QuestionChoice
Alpha 1 receptors are predominantly located in vascular smooth muscle. They are commonly prescribed to treat hypertension as they cause smooth muscle relaxation.
10026799
e
Alpha 1 receptor antagonist
QuestionChoice
The leukotriene receptor antagonists block the activity of cysteinyl leukotrienes at their receptors (CysLT1) on bronchial smooth muscle.
10026797
c
Leukotriene receptor antagonist
QuestionChoice
Beta 1 receptors are predominantly found in the heart, kidneys and adipose tissue. Beta 1 antagonists are commonly used in the treatment of hypertension due to their negative chronotropic and ionotropic effects on the heart.
10026798
d
Beta 1 receptor antagonist
Concept
Chapter
2693
3725
Asthma
Topic
132
Respiratory
17757
A 19-year-old male has recently had his asthma medications re-evaluated and has been told to continue his blue inhaler and the doctor has added in a twice-daily steroid inhaler. He is interested in the pharmacology behind the medications.

Which of the following describes the mechanism of action of salbutamol?
a