What change occurs in adrenal activity during SNS activation?

During sympathetic nervous system (SNS) activation, the adrenal glands are stimulated to increase the production of catecholamines, specifically norepinephrine and epinephrine. This process is part of the body's "fight or flight" response, which prepares the individual to respond to stress or danger. The release of these hormones leads to physiological changes such as increased heart rate, enhanced blood flow to muscles, and heightened alertness, all designed to improve the body's ability to deal with a threat.

The increase in norepinephrine and epinephrine is critical for mobilizing energy resources and preparing the body for rapid action. This heightened activity of the adrenal glands is a key response in the sympathetic nervous system activation, distinguishing it from other hormonal activities that may occur at rest or during other states of bodily function.