NSCI 0817 Study Guide - Midterm Guide: Neural Tube, Neural Plate, Olfactory Bulb
30 Aug 2016
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Neuronal activities influence protein expression directly or indirectly. Protein is expressed through transcription and translation. Surgical procedures illustrated disruptions of cortex by small set of. Day 0- sperm meets oocyte (egg) turns to zygote. Day 3-4- morula (solid cell mass) forms with roughly 12-32 cells forming the blastocyst. Gastrulation: (3) germ cells: endoderm- internal organs, mesoderm- muscle, bone, circulatory system notochord, notochord: release signals to direct formation of neural plate (becomes ns, ectoderm- skin/nervous system. Neurulation: simple neural tube primitive brain: notochord sends signals to ectoderm, neural plate folds, neural groove/tube forms, (in tube) neural precursor cells produce neurons/glia (at 22 days) Neural crest becomes pns (at 24 days) Neural plate expands becoming brain: subdivisions occur after neural tube is closed. Diff. signals activate diff. genes producing diff. cell growth in brain. Radial route (more common)- glial cells guide axon growth, initiate migration. Retina: layer of eye covered with 2 types photoreceptors (rods-vision, cones- color)
