What substance flows into the bloodstream to signal the liver and fat cells to liberate their stored energy nutrients when physical activity continues beyond the first few minutes?

Question

Quizplus · Accepted Answer

Epinephrine, also known as adrenaline, is released into the bloodstream during prolonged physical activity to signal the liver and fat cells to release stored energy nutrients. This allows the body to maintain its energy needs during prolonged exercise. Thyroxine and norepinephrine are also hormones involved in regulating metabolism and energy expenditure but are not the primary signaling molecules for energy release during exercise. Lactic acid is a byproduct of anaerobic energy metabolism and does not have a direct role in signaling for energy release from the liver and fat cells.

What Substance Flows into the Bloodstream to Signal the Liver