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What are some key points made by Dr. Putthoff about the human nervous system?
- 1- Processing Center
- 2- Links "you" with the outside world
- 3- a significant portion of genome codes for nervous system
- 4- Neurons, 10^11, heterogeneous population of cells
- 5- complex and unique anatomic/physiologic characteristics.
What role do neurons play?
electrically excitable cells that process and transmit information through electrical and chemical signals.
What are Glial cells?
non-neuronal cells that maintain homeostasis, form myelin, and provide support and protection for neurons of CNS and PNS. Differentiated by nuclear appearance or location
Macroglia cells arise from what tissue type?
Astrocytes, oligodendrocytes, and ependymal cells are derived from what tissue type?
What is neuroectoderm?
ectoderm that receives Bone Morphogenetic Protein-inhibiting signals making nervous tissue.
What role do astrocytes play?
Star-shaped glial cells in the brain and spinal cord. Most abundant cell of the human brain. Help maintain the blood-brain barrier and they envelope synapses to help clear neurotransmitter chemicals. Other roles include glycogen fuel reserve buffer, metabolic support, blood-brain barrier, nervous system repair.
What is the role of oligodendrocytes?
main function is to provide support and insulation to the axon in the CNS. (Schwann cells in the PNS).
What do ependymal cells do?
ependyma is the thin epithelium-like lining of the ventricals of the brain. Produce CSF. Their apical surface is covered in a layer of cilia to help move around the CSF.