Sensation

Disclaimer: Not a doctor or expert in anatomy. I am trying to learn thus I am providing content I am reviewing for others to review as well if they wish.

The G-protein Couple Receptor (GPCR) (7-transmembrane receptors) are pretty cool. They respond to ligands and change their functionality until returned back to normal (GTP back to GDP and released Ligand potentially via RGS). Reminds me of State Machines in Engineering. Transitions to a different state dependent on a signal (the ligand) and becomes a factory for other molecules. Epinephrine the ligand binds to the GPCR then changes its GDP to GTP. In the new state it then continuously converts ATP to cAMP until state is returned to normal state.

I the writer of this vlog am not the one that made these videos. I think this information is valuable, the joke about shining light in friends eyes is memorable though I would not recommend it (flashlights are higher lumen these days with potential for damage closer to lasers).

The eyes are better at seeing Luminance stated in the video about JPEG Compression yet in the Crash Course it is stated that the eye is more responsive to Chrominance. Seems like the JPEG Algorithm would not use the wrong values thus my current comprehension is the Eye has more ability to see Details based on Luminance (Light Intensity) over Chrominance (Color).