This video tells us about the working of receptors in aiding the drug to work effectively with in body together with the types of receptors involved in its mechanism. TIMELINE: 0:04 Introduction 0:56 STP and its types ( kinases , phosphorylases) 1:26 Example ( receptor--protein--transduction--sec.message--target cell) 2:22 Animation of signal epinephrine 2:44 G-protein receptors ( ligand) 3:32 Adenylyl cyclase 5:11 Protein kinases 6:20 Glucose release 6:46 Review 9:25 Conclusion