====== Biochemistry ======

Relative sizes of neurotransmitters and neurons.

Hunger, satiation
Two thermostats, one to start eating, one to stop eating.

But...
How do the hormones translate to action?

Low blood sugar.
Desire is created.
Activity engaged.

amino acid peptide polypeptide protein folding amino acid side chain 
amino acid peptide protein
https://www.google.com/search?q=amino+acid+peptide+protein&oq=amino+acid+peptide+protein&aqs=chrome..69i57j0l3.7404j0j7&client=ms-android-google&sourceid=chrome-mobile&ie=UTF-8#sbfbu=0&pi=amino%20acid%20peptide%20protein

Peptide - Wikipedia
https://en.wikipedia.org/wiki/Peptide

How enzymes work
https://youtu.be/yk14dOOvwMk

===== Oxidation and Reduction =====

Khan Academy: Oxidation and Reduction from Biology point of view
https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/v/oxidation-and-reduction-from-biological-view?utm_source=YT&utm_medium=Desc&utm_campaign=biology

OIL RIG
  * Oxidation Is Losing (electrons)
  * Reduction Is Gaining (electrons), more like "hogging" 

reaction equation

$$\require{mhchem}$$

$$\ce{2H2(g) + O2(g) -> 2H2O + \text{heat}}$$

combustion reaction

Oxidation in chemistry, biochemistry, cellular respiration 

\begin{align}
\text{glucose + oxygen} &-> \text{carbon dioxide + water + energy}\\
\ce{C6H12O6 (aq) + 6O2 &-> 6CO2 + 6H2O + 38 ATP}\\
\ce{C6H12O6(aq)} &= \text{glucose in aqueous solution}\\
\ce{O2} &= \text{oxygen}\\
\ce{CO2} &= \text{carbon dioxide}\\
\ce{H2O} &= \text{water}\\
\ce{C10H16N5O13P3} &= \text{Adenosine Triphosphate (ATP)}\\
\end{align}

1 mole of glucose in aqueous solution\\ 
plus 6 moles of oxygen\\
yields 6 moles of carbon dioxide\\
plus 6 moles of water\\
plus 38 ATPs

===== Photosynthesis =====


Khan Academy: Photosynthesis
https://www.khanacademy.org/science/ap-biology/cellular-energetics/photosynthesis/v/photosynthesis#:~:text=Photosynthesis%20is%20usually%20represented%20by,Created%20by%20Sal%20Khan.

\begin{align}
\text{carbon dioxide + water + sunlight} &-> \text{carbohydrate + oxygen}\\
\ce{CO2 + H2O} + \text{photons} &-> \ce{CH2O + O2}\\
\end{align}

Bozeman Science: Photosynthesis and respiration
https://www.youtube.com/watch?v=0IJMRsTcwcg

10:41  line graph of atmosphere $\ce{O2}$ contents