What effect do catecholamines have on metabolism?

Catecholamines, which include hormones such as epinephrine and norepinephrine, play a crucial role in the body's response to stress and are involved in the fight-or-flight response. When released, these hormones significantly increase metabolic activity by stimulating processes that generate energy.

One of the primary functions of catecholamines is to enhance the breakdown of glycogen into glucose (glycogenolysis) and to promote the release of fatty acids from adipose tissue (lipolysis). These processes result in increased availability of glucose and fatty acids for energy production, thereby elevating the basal metabolic rate. This increase in basal metabolism means that the body utilizes energy more rapidly and efficiently, supporting heightened physical activity and alertness during stress.

Overall, the presence of catecholamines boosts metabolic processes that are essential for responding to various physiological needs, particularly during times of increased demand.