This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
The metabolic effects of sympathomimetics are mediated by 
Select and explain. 
A. All beta-adrenergic receptors, B. Dopaminergic receptors, C. Beta 2 receptors, D. Opioid receptors
A: All beta-adrenergic receptors
Answer: A: All beta-adrenergic receptors 
Explanation: None