Glossary of ex 17 nervous tissue
Created by katy.katy_katy
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Description
Learn about microglia, oligodendrocytes, astrocytes, nuclei, ganglia, tracts, Neurofibrils, nissl bodies, collaterals, unipolar neurons
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- microglia
- act as phagocytes
- oligodendrocytes
- myelinte the cytoplasmic extensions of the neruons
- astrocytes
- play a role in capillary neuron exhanges, and control the chemical environment around the neuron
- nuclei
- clusters of cell bodies in the CNS
- ganglia
- collections of cell bodies in the PNS
- tracts
- neuron processes running through the CNS
- Neurofibrils
- the cytoskeletal elements of the neuron
- nissl bodies
- an elaborat type of RER involved in the metabolic activities of the cell
- collaterals
- branches coming off of xons of neurons
- unipolar neurons
- 1 very short procepps- peripheral and central divisions; conduct impulses toward the CNS
- bipolar
- 2 processes attached to cell body- only found as part of receptor apparatus of eye, ear, and olfactory mucosa
- multipolar neurons
- many processes from cell body- all dendrites except one axn- most in brain and spinal cord and efferent neurons
- sensory/ afferent neurons
- cell bodies always in ganglion outside the CNS and are typically unipolar
- efferent/motor neurons
- neurons carrying activating impulses from the CNS to the viscera and/or body muscles and glands; usually multipolar and cell bodies almost always located in teh CNS
- Association neurons/interneurons
- contribute to pathways that cnnet sensory and motor neurons; cell boides always in the CNS and are multipolar
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