Studied by 0 people
Looks like no one added any tags here yet for you.
Action Potential
Electrical signal traveling along neurons.
Neurons
Cells transmitting electrical and chemical signals.
Resting Membrane Potential
Voltage difference across neuron membrane (~ -70mV).
Sodium-Potassium Pump
Transports 3 Na+ out, 2 K+ in.
Depolarization
Na+ influx makes neuron more positive.
Threshold
Voltage level (~ -55mV) for action potential initiation.
Repolarization
Restoration of negative charge after depolarization.
Hyperpolarization
Temporary increase in negativity (~ -75mV).
Propagation
Action potential travels along axon in waves.
Myelin Sheath
Insulation speeding up signal transmission.
Saltatory Conduction
Action potentials jump between Nodes of Ranvier.
All-or-None Principle
Action potential occurs fully or not at all.
Refractory Period
Time during which neuron cannot fire again.
Synaptic Transmission
Release of neurotransmitters across synapse.
Neurotransmitters
Chemical signals initiating action potentials in receiving neurons.
Voltage-Gated Channels
Channels that open/close in response to voltage changes.
Axon Terminal
End of neuron where neurotransmitters are released.
Chemical Signals
Signals occurring between neurons at synapses.
Neural Communication
Process involving electrical and chemical signaling.
Nodes of Ranvier
Gaps in myelin sheath for saltatory conduction.
Schwann Cells
Cells producing myelin in the peripheral nervous system.
Oligodendrocytes
Cells producing myelin in the central nervous system.
