Neuron Function (Action Potentials) lecture 13

what are the Ion channels ?

Ligand Gated ion Channels

Mechanically Gated ion Channels

Voltage Gated ion Channel

what is the ligand gated ion channels

Ligand gated ion channels open when the appropriate neurotransmitter binds to the receptor, allowing (in this case) simultaneous movement of Na+ and K+.

what is the mechanically gated ion channels

Open in response to physical deformation of receptor

what is the voltage gated ion channels

Open when membrane reaches a certain charge (threshold)

what is the Depolarization

less negative and more positive.

what is hyperpolarization?

the inside becoming more negative. (more polarized).

what are the set to get to action potential

Resting state

Depolarization

Repolarization

Hyperpolarization

Na+- K+ Pump Restores Ion Concentrations