ACCTG 1 Lecture Notes - Lecture 29: Mirror Neuron, Axon Hillock, Myelin
Document Summary
Neurons: the basic building blocks of the nervous system. > consists of: a cell body, dendrites, and an axon. Surrounding the neurons there are glial cells which hold the neurons on place, produce nutrients for the neurons, and absorb toxins. Cell body (=soma): contains biochemical structures needed to keep the neuron alive. It"s nucleus holds genetic information on cell development and function. Dendrites: receivers that receive information from neighbouring neurons. Axon: conducts electrical impulses away from the cell body to other neurons, muscles, or glands. Axon hillock: where the soma connects with the axon. Axon terminals: connect to thousands of dendrites of other neurons. Node of ranvier: give the opportunity for neuron to communicate with the outside. This allows for new boost of electro-potential through the voltage gated channels, to re- energize/amplify the action potential (=saltatory conduction); without it, the potential would dissipate when going long distance through the axon.
