What type of biological effect do agonists produce?

Agonists are substances that bind to specific receptors in the body and activate them, leading to a biological response. The primary function of an agonist is to mimic the action of a natural substrate or neurotransmitter, effectively initiating or enhancing a physiological response. This activation can lead to various responses depending on the type of receptor and the system involved, such as increased heart rate when binding to adrenergic receptors or increased insulin secretion when binding to pancreatic receptors.

In this context, the term "activating effects" accurately captures the essence of what agonists do, as they stimulate or enhance activities within the biological systems they act upon. This contrasts with other types of responses, such as suppressive effects, which reduce activity, or neutral effects, where there is no significant change in physiological response.