🕸️01
Nervous System Organization
CNS vs PNS, sensory vs motor, somatic vs autonomic.
Open →⭐02
Neuroglia
The six glial cells that support, insulate, and defend neurons.
Open →🔋03
Resting Membrane Potential
Ion gradients, leak channels, and the Na⁺/K⁺ pump at −70 mV.
Open →⚡04
The Action Potential
Fire a neuron — depolarize, repolarize, hyperpolarize.
Open →🏃05
Saltatory Conduction
Watch a signal leap node to node on a myelinated axon.
Open →🔀06
The Synapse
Neurotransmitter carries the message across the gap.
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