Which option is a beta-adrenergic receptor subtype?

Which option is a beta-adrenergic receptor subtype?

• A. Alpha1
• B. Beta1
• C. Alpha2
• D. Muscarinic

Answer: (B)

Beta-adrenergic receptors are part of the sympathetic system and come in several subtypes, including Beta1, Beta2, and Beta3. The option that represents a beta-adrenergic receptor subtype is Beta1. The other choices are not beta-adrenergic receptors: Alpha1 and Alpha2 are alpha-adrenergic receptors, while Muscarinic receptors are cholinergic (respond to acetylcholine) rather than adrenergic. In terms of function, Beta1 receptors are mainly in the heart, where their activation increases heart rate and contractility, which helps anchor why this is the correct subtype here.

Beta-adrenergic receptors are part of the sympathetic system and come in several subtypes, including Beta1, Beta2, and Beta3. The option that represents a beta-adrenergic receptor subtype is Beta1. The other choices are not beta-adrenergic receptors: Alpha1 and Alpha2 are alpha-adrenergic receptors, while Muscarinic receptors are cholinergic (respond to acetylcholine) rather than adrenergic. In terms of function, Beta1 receptors are mainly in the heart, where their activation increases heart rate and contractility, which helps anchor why this is the correct subtype here.