RRT RRT Pharmacology

Question 1

Which bronchodilator class acts by blocking muscarinic receptors to relax airway smooth muscle?

Accepted Answer

Anticholinergics

Answer

Anticholinergics such as ipratropium block muscarinic receptors, preventing bronchoconstriction mediated by the parasympathetic nervous system.

Question 2

What is the primary mechanism of action of albuterol?

Accepted Answer

Beta-2 adrenergic agonism

Answer

Albuterol selectively stimulates beta-2 adrenergic receptors on bronchial smooth muscle, causing bronchodilation.

Question 3

Which inhaled corticosteroid is commonly used for long-term control of asthma in the US?

Accepted Answer

Fluticasone

Answer

Fluticasone is a commonly prescribed inhaled corticosteroid that reduces airway inflammation for long-term asthma control.

Question 4

What drug class does theophylline belong to?

Accepted Answer

Methylxanthine

Answer

Theophylline is a methylxanthine bronchodilator that inhibits phosphodiesterase, raising cAMP levels and causing bronchodilation.

Question 5

Which medication is used as a mucolytic to thin secretions in patients with COPD or cystic fibrosis?

Accepted Answer

N-acetylcysteine

Answer

N-acetylcysteine (Mucomyst) breaks disulfide bonds in mucus glycoproteins, reducing viscosity and aiding secretion clearance.

RRT Exam Practice Test