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17 Cards in this Set
- Front
- Back
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what structure serves as a relay for the sensory info? and where does this info go?
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the relay is thalamus and the info is carried to the cortex, remember this is all sensory
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what are the sensory neurons?
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afferents, located dorsally they bring sensory info like visual, auditory, pain , touch to the nervous system
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what are the motor neurons?
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motor neurons are efferents, located ventrally, they synapse on the muscles
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how many types of the motor neurons are there?
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there are 2 types of MN,
1) brain and spinal chords> send axons thru lower MN, effected by polio 2)motor cortex> they send neurons axon thru upper MN, and when effected cause ALS |
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what are the interneurons?
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they serve as the mediators b/t sensory and motor neuron, make up about 95% of our neurons, they allow communication b/t motor and sensory
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how many types of Interneurons are there?
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2 types
1)projection> these go through many different tissues 2)local> these go through a certain type of tissue |
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what is a neuromuscular Junction? what kind of axon?what is the target?neurotransmitter released?what receptors bind?
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NMJ> is cholinergic
Axon>lower MN Target>muscle fibers this is where axon from Lower MN synapse NT>Ach Receptor> nicotinic |
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what is the function of neurons?
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neurons process information, they carry signal from the Nervous system and once depolarized they release NT
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what do glial cells do?
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glial cells nurture neurons, they are responsible for maintaining homeostasis for the neurons like maintaining GF, and NT
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What are astrocytes?
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glial cells, the are CNS, and they are responsible for maintaining GF
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what are oligodendrocytes?
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they are myellin producing glial cells of the CNS
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what are microglial cells?
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their function is still un-clear but they are considered the immune cells of the nervous system
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what are they myellin producing cells of PNS?
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schwan cells, they may or may not produce myelin
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what are satellite cells?
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they are located next to the cell bodies of the sensory neurons, theu make sheath
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where would the afferents be located? where would efferents be located?
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afferents or sensory would be located dorsally, and efferents would be located ventrally MN,
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what is the NT for sensory/dorsal side of the spinal chord?
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these synapse on the dorsal horn of the sp. chord, the cell bodies lie in DRG, and release norepi
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what is the NT for MN? where are they located?
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MN are located on the ventral side and they usually release Ach
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