Welcome to IS PHARMACOLOGY DIFFICULT Podcast! I am Dr Radhika Vijay, i today's episode, I will be starting off with the receptors details. Firstly I will be clearing the terms effectors and receptors. So far I have told you about Enzymes, ion channels and transporters , they all are effectors. Receptors are specific regulatory macromolecules which control the effectors hence these are binding sites are found on surface or inside the effector cell. it recognises signal molecule or drug and also initiates the response. It Itself has no other function. Layman generally calls all receptors, but Ii will advise you to be clear about effector and receptor.This is cleared with the help of apt examples. Reserve the term receptor and demarcate it nicely from effector.Next I will clear few definitions like Agonist, Inverse Agonist, Antagonist, Partial agonist, their actions, why they are called  like that and what is their exact function, all I will clear and furnish your concepts. Ligand is our last term of day, I will throw light on origin of term, its function, differences from agonist and antagonist. With all these basic definitions and descriptions, I will call it for the day, hope you having great relaxing, safe weekend and preparing for a great start of the week, till next episode, do follow me here, do rate and review on ITunes, Apple podcasts, stay tuned, thank you!!