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17 Cards in this Set
- Front
- Back
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Name and briefly describe the 2 anatomical subdivisions of the nervous system.
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1 Central Nervous System (CNS): brain & spinal chord
2 Peripheral Nervous System (PNS): cranial nerves, spinal nerves, ganglia |
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The PNS is subdivided in to 2 divisions. List them and state what kinds of signals they carry and where they carry them to.
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1 Afferent: senory info to the CNS
2 Efferent: motor info to effectors |
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What are the two basic types of effectors that recieve motor information from the nervous system?
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1 Muscle (skeletal, smooth, cardiac)
2 Glands |
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The afferent division carries signals to the spinal chord from 2 kinds of sensory receptors. Name them and state where they bring sensory info from.
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1 Somatic: info we are conscious of from the skeletal muscle, joints, & skin
2 Visceral: info we are generally unaware of from smooth muscle, cardiac muscle, & glands |
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What kinds of sensors are located in the head and have their information carried back to the brain via cranial nerves?
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Special senses
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What are two divisions of the efferent division and where do they deliver signals to?
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Somatic: most voluntary, info to skeletal muscles
Autonomic: involuntary, info to smooth muscle, cardiac muscle, glands |
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What basic part of a neuron, generally occurring in multiples and highly branched, is stimulated by environmental changes or the activities of other cells?
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Dendrites
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What basic part of a neuron contains the nucleus, mitochondria, ribosomes and most other organelles?
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Cell body (aka soma)
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What basic part of a neuron, occurring singly, conducts nerve impulses towards a synaptic terminal where the neuron communicates with another cell over a synapse?
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Axon
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What type of neuron carries information to the CNS?
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Sensory
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What type of neuron carries information from the CNS to effectors?
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Motor
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What type of neuron is located entirely in the CNS where it analyzes sensory inputs and coordinates motor outputs?
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Interneurons
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Name the 4 types of neuroglia in the CNS and briefly describe their function?
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Astrocytes
-control interstitial environment -blood brain barrier Oligodendrocytes -myelin sheath Microglia: phagocytes Ependymal cells: CSF (cerebral spinal fluid) secrete, circulate, and monitor |
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What dominates white matter?
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Myelinated axons
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What dominates gray matter?
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Unmyelinated axons
Dendrites Cell bodies |
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What do we call bundles of neuron cell bodies found outside of the CNS?
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Ganglia
(singular=ganglion) |
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Name the 2 types of neuroglia in the PNS and briefly describe their function.
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Satellite Cells
-isolate sensory neuron cell body Schwann Cells -myelin sheath |
