01:119:101 Lecture Notes - Lecture 4: Schwann Cell, Myosatellite Cell, Cell Membrane

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:101
• Professor: uzwiak

Document Summary

Axons & dendrites differ in quantity, length, & size. Neurons share these features dendrites, a cell body, an axon. White matter is myelinated axons, considered fiber tracts. Neurons by structure: unipolar, bipolar, multipolar; based on # of processes. Bipolar neurons are in the eyes, ears, nose. Multipolar neurons are 99% of neurons, most of neurons in cns. Sensory neurons are afferent, mostly unipolar and some bipolar. Interneurons link most neurons, multipolar, located in cns. Types of neuroglial cells in the pns: schwann cells & satellite cells. Schwann cells function to produce myelin found on peripheral myelinated neurons; speed up neurotransmission. Types of neuroglial cells in the cns: microglia, astrocytes, oligodendrocytes, Astrocytes function to connect neurons to blood vessels, induce synapse formation, mop up excess ions, forms scar tissue. Ependyma function to line to central canal of spinal cord and ventricles of brain (are ciliated) What happens at a synapse nerve impulses pass from neuron to neuron.