Explore the intricate world of biosignaling in this comprehensive video lecture on G-Protein and G-Protein-Coupled Receptors (GPCR). Delve into the structure and function of cell surface receptors, focusing on their crucial role in physiology and endocrinology. Learn about the activation process of G-proteins and their coupled receptors, as well as the significance of cyclic AMP in signal transduction. Examine the parasympathetic nervous system and dopamine's involvement in GPCR signaling. Gain a deeper understanding of these essential components in cellular communication and their impact on various physiological processes.