NEUROSCI 101 Study Guide - Midterm Guide: Rita Levi-Montalcini, Neuroanatomy, Radial Glial Cell
4 Feb 2016
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Neuroscience 101 exam i review part iii. Neurons + glia = 3lbs of neuroanatomy perhaps entirely unique to humans (as far as we know) increases from 400g (birth) to appx. 1400g (10y/o); most of increase occurs by age 5. Gray matter more dense: cell body (contains nucleus, dendrites (convey incoming/afferent information from other cells to the body, axons (covered in myelin, convey outgoing/efferent information from the cell. White matter less dense body to other neurons) Function transmit information each neuron has thousands of neuronal connections to other neurons: each cell made at birth, connections established both then and via experience. Support deliver raw material from vascular system to neurons, release growth factors, remove debris from injured cells, form myelin sheaths) Myelin: fat, produced by glial cells, increase neuronal signal conduction down axon produce chemicals modify/modulate the functioning of neurons directly and indirectly. Building a brain = building a house: new plans are never started from scratch.
