ANP 1105 Lecture : Physiology of the Neuron.doc
Document Summary
Also called nerve cells; they are the structural unit of the nervous system. Highly specialized cells that conduct messages in the form of nerve impulses from one part of the body to another. The 3 functional regions are the receptive region, conducting region, and the secretory region. With good nutrition, neurons can function optimally for a lifetime: amitotic. Neurons lose their ability to divide as they assume their roles as communicating links of the nervous system: high metabolic rate. Requires abundant supplies of oxygen and glucose and cannot survive more than a few minutes without oxygen. Consists of a spherical nucleus with a nucleolus surrounded by cytoplasm. Rough er is known as nissl bodies or chromatophilic substance. Cell body is the focal point for outgrowth of neuron processes nuclei- clusters of cell bodes in the cns ganglia- cell bodies that lie along the nerves in the pns. Armlike processes extend from the cell body of all neurons.