Good tutorial about intracellular signaling mechanism.... I just wanna add few notes like 1) GPCR can be downregulated by activating Beta-Arrestin protein 2) Catalytic or enzymatic or one pass receptors are of four sub types... A)Tyrosine kinase receptors [Dimeric :eg is NGF,BDNF etc are working through it, & Tetrameric like Insulin receptor] B) Tyrosine kinase associated JAK-STAT receptors pathways through which all the cytokines & Erythropoietin act C) Serine-Threonine receptors: TGF-beta acts through & D) Cyclic- GMP meadiated rec through which NO, VIP act...
Reception and transportation are two different functions. The classification is based on functions. Some molecules do both the functions e.g. ligand gated channels , so they are included in both, transporters and receptors. But not all transporters are receptors and not all receptors are transporters. Hope you get it.
Receptors are for receiving signals (Watch video on cell to cell communication for more detail). And transporters are for transporting molecules across cell membrane (watch video on transport across cell membrane for more detail).
I follow the same creation work flow as followed by all professional studios to create animations. You can search on web how animations are created. It's huge area on it's own. Regarding "observation" the visuals that I use are metaphorical. What's actually observed is biochemical reactions. I hope that's what you meant.
