What evidence is there that regulation is chemical in nature?

Answer 1

Regulation in biological systems often involves chemical signaling, where molecules such as hormones, neurotransmitters, and enzymes interact with specific receptors to elicit responses. For example, the binding of insulin (a hormone) to its receptor on cells triggers a cascade of biochemical reactions that regulate glucose uptake. Additionally, feedback mechanisms, such as the inhibition or activation of enzymes, demonstrate how chemical interactions govern metabolic pathways. These examples illustrate that regulation is fundamentally rooted in chemical processes.