1) Physiology Foundations: Homeostasis, Cell Membrane Transport, and Osmolarity/Tonicity.

In order to better understand more complex physiological concepts (like action potentials, muscle contractions, etc.), it is crucial to form a foundation of basic principles.
I attempt to solidify my understanding of these concepts as I practice teaching them.
Disclaimer: I am not a professor. I don't know everything. :D
Rough Time Stamps:
2:00 Negative Feedback Systems
12:50 Positive Feedback Systems
15:20 Inadequate Negative Feedback
20:00 Transport: Active and Passive
38:50 Osmolarity
41:55 (ish) Tonicity
48:30 & 54:48 How an Isosmotic solution (5% Dextrose) can become Hypotonic to a cell.