MRCPCH TAS Practice Questions - MRCPCH Theory And Science (TAS) Exam

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Salbutamol is given to a child with acute asthma. Through which receptor and second messenger does it relieve bronchospasm?

Histamine H1 receptor blockade preventing mast cell degranulation Muscarinic M3 receptor blockade reducing acetylcholine effect Alpha-1 adrenoceptor activation causing vasoconstriction Beta-2 adrenoceptor activation increasing intracellular cyclic AMP

Correct Answer:

Beta-2 adrenoceptor activation increasing intracellular cyclic AMP

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