Neurophysiology 3

Action Potential

100

An action potential will occur once the voltage threshold to open Na+ channels has been reached

All or None Law

200

Because the membrane is hyperpolarized, it is unlikely to produce an action potential

Relative Refractory Period

300

Keeps propogation going down the axon because voltage-gated Na+ channels are either already open or inactivated

Absolute Refractory Period

400

Action potential starts in the ____ and travels down the axon to the _____

Axon hillock; axon terminal

AP Propagation

100

Propagation occurs faster in ____ axons

Myelinated axons

200

Site of propagation in myelinated axons

Nodes Of Ranvier

300

Action potential propagation in myelinated axons

Saltatory Conduction

400

Graded potential where the membrane potential depolarizes

Excited post-synaptic potential

500

Graded potential where the membrane potential hyperpolarizes

Inhibitory post-synaptic potential