Question

A drug is called an agonist if it ________.

A.) blocks a receptor
B.) interferes with neurotransmitter reuptake
C.) acts like the endogenous neurotransmitter by binding to its receptor
D.) blocks the voltage-gated calcium ion channel

Answer 1

An agonist is a drug that acts like the endogenous neurotransmitter by binding to its receptor, increasing the activity of specific neurotransmitters. For example, dopamine agonists are used to treat Parkinson's disease.

Step-by-step explanation:

An agonist is a drug that acts like the endogenous neurotransmitter by binding to its receptor. Agonists increase the activity of specific neurotransmitters by promoting their synthesis, reducing reuptake, or mimicking their action at the receptor site. For example, dopamine agonists are used to treat Parkinson's disease by mimicking the effects of dopamine.