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63093
Overview
Descrição
Biochemistry (Cellular Neurobiology) Mapa Mental sobre Overview, criado por zambrella em 30-04-2013.
Sem etiquetas
biochemistry
cellular neurobiology
biochemistry
cellular neurobiology
Mapa Mental por
zambrella
, atualizado more than 1 year ago
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Criado por
zambrella
aproximadamente 11 anos atrás
52
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0
Resumo de Recurso
Overview
Nervous System
Central
Brain
Forebrain
Midbrain
Hindbrain
Spinal cord
Peripheral
Sensory
Autonomic
Sympathetic (arousing)
Parasympathetic (calming)
Two types of cell
Nerve cells - neurons
Convey information
Anatomy
a) Dendrites - input
b) Soma (cell body) - decision making
c) Axon hillock - initiation of action potential
d) Axon - transmits action potential
e) Axon terminals - multiple endings
f) Synapses - communication
Classification
Shape
Role
Sensory
Motor
Interneurons
Glial cells
Support, help convey information
Can be divided into macroglia and microglia
Macroglia
Oligodendrocytes
Myelinating in CNS
Astrocytes
Schwann cells
Myelinating in PNS
Microglia
Macrophages
Functions
Scaffolding for neuronal migration and axonal outgrowth
Structural support, like connective tissue in other organs
Neurotransmitter clearance
Insulation
Between cells and around axons
Clean up
After injury or death - remove debris
Chemical and electrical buffers
K+ concentraion
Form blood-brain barrier
Nutritive role - growth factors or proteins necessary for neuronal function
Can regulate neuronal signalling - thus effect information storing
Neuroglia - CNS
Ependymal cells
Line central canal and ventricles of the brain
Cuboid cells but have no basement membrane
Have beating cilia when lining the ventricles
Specialised ependymal cells participate in the secretion of Cerebral Spinal Fluid (CSF)
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