LECTURE 10 2-11-15- Glial Cells and Neuron RepairSteps to Neuron Repair1. When an axon in the PNS is severed, the axon (but not the neuron) dies2. Schwann cells that were myelinating that axon shrink and divide along the axon’s former path3. The Neuron sends out axon sprouts and whichever one finds the glial pathway becomes the new axon4. Schwann cells envelop new axon, forming new myelin- Inside the Cell…Cell membrane- the “skin” that surrounds the cellsRegulates substancesPhospholipid bilayerNucleus- structure inside the soma that contains chromosomes and genesHuman cells contain 23 pairs of chromosomesConsisting of four nucleotide bases (DNA)(A) adenine(T) thymine(G) guanine(C) cytosineGene- DNA segment that encodes the synthesis of a particular proteinProteinsThese cells are producing proteins1 cell can use up to 10,000 protein moleculesEndoplasmic Reticulum (maze-like; where proteins are created)Golgi bodies (taxis of the cell; carry proteins where they need to go within the cell)See Page 93, Figure 3-13 in textbookFigure 3-10 is a figure we need to look over and knowProteins in the cell membraneChannelsGatesPumpsNa+ and K+PSYC 260 1st EditionLecture 10Outline of Last LectureI. Glial Cells and Neuron RepairOutline of Current LectureI. Glial Cells and Neuron Repair (Cont.)II. Inside the CellCurrent Lecture LECTURE 10 2-11-15 - Glial Cells and Neuron Repair- Steps to Neuron Repairo 1. When an axon in the PNS is severed, the axon (but not the neuron) dieso 2. Schwann cells that were myelinating that axon shrink and divide along theaxon’s former patho 3. The Neuron sends out axon sprouts and whichever one finds the glial pathway becomes the new axono 4. Schwann cells envelop new axon, forming new myelin - Inside the Cell…- Cell membrane- the “skin” that surrounds the cellso Regulates substanceso Phospholipid bilayer- Nucleus- structure inside the soma that contains chromosomes and geneso Human cells contain 23 pairs of chromosomes  Consisting of four nucleotide bases (DNA) (A) adenine (T) thymine (G) guanine (C) cytosineo Gene- DNA segment that encodes the synthesis of a particular protein - Proteinso These cells are producing proteins 1 cell can use up to 10,000 protein molecules o Endoplasmic Reticulum (maze-like; where proteins are created) o Golgi bodies (taxis of the cell; carry proteins where they need to go within the cell)o See Page 93, Figure 3-13 in textbooko Figure 3-10 is a figure we need to look over and know- Proteins in the cell membraneo Channelso Gateso Pumps Na+ and