Biology 449 - Animal Physiology September 12, 2008

Lecture 7 - Neurophysiology III

Action Potentials (cont'd)

Generation of A.P.'s

Description

Voltage-gated ion channels

Refractory period

Propagation of A.P.'s

Mechanism

Speed of conduction

Synaptic Transmission

Basic concepts

Electrical synapses

Chemical synapses

General structure and function

Ionotropic and metabotropic receptors

G-protein complex

Excitation vs. inhibition

Neuronal integration

 

Terms to Know

Voltage-gated sodium channel
Voltage-gated potassium channel

Absolute refractory period
Relative refractory period

Cable properties

Myelin
Node of Ranvier
Saltatory conduction

Electrical synapse
Gap junction

 

Chemical synapse
Presynaptic neuron
Postsynaptic neuron
Synaptic cleft
Synaptic vesicle
Synapsin
Neurotransmitter
Voltage-gated Ca2+ channel
Receptor protein

Acetylcholine (ACh)
Acetylcholinesterase (AChE)

Ionotropic receptor
Metabotropic receptor

G-protein complex

Excitation
Inhibition
Excitatory postsynaptic potential (epsp)
Inhibitory postsynaptic potential (ipsp)

Neuronal integration
Temporal summation
Spatial summation

 

Readings

Lecture 7:   Chapter 4, pages 122-137
Lecture 8:   Chapter 6, pages 196-202