Question

which of the following statements is true? the stimulation of beta - adrenergic receptors can lead to 1. an increase in metabolic activity. 2. contraction of airway smooth muscle. 3. the breakdown of triglycerides within adipocytes. 1 only 2 only 3 only 1 and 3 only 1, 2, and 3

Explanation:

• Beta - adrenergic receptor stimulation increases metabolic activity (e.g., in the liver, it can enhance glycogenolysis and gluconeogenesis which are part of metabolic processes).
• Beta - adrenergic receptor stimulation causes relaxation of airway smooth muscle (not contraction. Muscarinic receptors are more associated with contraction of airway smooth muscle).
• Beta - adrenergic receptor activation in adipocytes leads to the breakdown of triglycerides (lipolysis) as part of the body's response to mobilize energy.

Answer:

1 and 3 only