Paper I — 2025 March (Supplementary (SAY)) (2019 Scheme) — Qxx

Paper I

2025 March (Supplementary (SAY)) (2019 Scheme) · 100 marks · 180 min

Question

Assertion (A): Beta-2 agonists, such as salbutamol, are used to treat asthma. Reason (R): Beta-2 agonists work by stimulating beta-2 adrenergic receptors on bronchial smooth muscles, causing bronchodilation.

Assertion) Beta-2 agonists, such as salbutamol, are used to treat asthma. Reason) Beta-2 agonists work by stimulating beta-2 adrenergic receptors on bronchial smooth muscles, causing bronchodilation.

• a) Both A and R are true, and R is the correct explanation of A
• c) A is true but R is false
• b) Both A and R are true, and R is not the correct explanation of A
• d) A is false but R is true

Qxx1 marksMCQs (A/R)★✓

Answer

Correct answer: a) Both A and R are true, and R is the correct explanation of A

Both statements are true, and R correctly explains A: salbutamol is a beta-2 selective agonist; stimulating beta-2 receptors on bronchial smooth muscle raises intracellular cAMP, producing bronchodilation — the direct mechanistic basis for its use in relieving asthma symptoms.

Related Concepts

1. 1Pharmacodynamics

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