Which of the following best describes an agonist inhibits...

Which of the following best describes an agonist? Inhibits the effect of the endogenous substance to a set point Promotes the effect of the endogenous substance Promotes the effect of the endogenous substance to a set point Inhibits the effect of the endogenous substance

A drug that increases the release of a neurotransmitter or enhances the activity of the neurotransmitter's receptor is called an agonist, whereas a drug that inhibits the activity of the neurotransmitter at the synapse is called an antagonist. For example, cocaine can be considered an agonist at the synapse. Not all drugs are the same; that is, different drugs interact with receptors and influence synaptic activity in different ways. Some are more or less effective than others. A drug that generally struggles to bind to a receptor at first but that strongly activates the receptor if it manages to bind to the receptor can be described as follows: this drug has low affinity and high efficacy.

Adi S.