5. Why Is Myelin Basically Biological Fibre Optic Cable?
Explore how myelin insulates axons and allows electrical signals to propagate faster through saltatory conduction.
Xander Chu
Founder, XC Psych
Psychology student at UNSW exploring psychology and neurobiology from first principles, with a background in data science, machine learning, software engineering, and tennis coaching.
5. Why Do Molecules Move Without Being Pushed?
Understand random molecular motion, thermal energy, and why particles are constantly moving.
6. Why Doesn't Everything Just Mix Together?
Learn how diffusion works, what concentration gradients are, and why biological systems maintain important differences.
6. How Does Electricity Become Chemistry?
Understand how an electrical action potential triggers chemical neurotransmitter release at the synapse.
7. How Does a Neuron Decide to Fire? ⚖️
Explore how excitatory and inhibitory inputs are integrated until the neuron either reaches threshold or does not.
8. What Are Ion Channels?
Learn how ion channels create selective pathways through cell membranes and control ion movement.
Module 0 - Foundations
Foundations — atoms, ions, diffusion, electrochemical gradients, membranes, ATP, and neuronal electricity.
9. What Are Ion Pumps?
Understand how ion pumps use energy to maintain the concentration gradients that make neuronal signalling possible.
Module 1 - Neural signalling
Neural signalling — membrane potentials, action potentials, myelin, synapses, ion channels, and pumps.
Did You See My Uppercut Coming?
What boxing can teach us about perception, prediction, visual-motor response time, and the difference between seeing a punch and seeing it coming.