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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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central nervous system (CNS): Brain/ spinal cord
Peripheral nervous system (PNS) : cranial nerves, spinal nerves, and ganglia |
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The PNS is subdivided into 2 divisions. List them and state what kinds of signals they carry and where they carry them to.
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Afferent: sensory info to the CNS
Efferent: motor info to effectors |
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What are the 2 basic types of effectors that receive motor information from the nervous system?
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Muscles: skeletal, smooth, cardiac
Glands |
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The afferent division carries signals to the spinal cord from 2 kinds of sensory receptors. Name them and state where they bring sensory information from.
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somatic: info we are conscious of from the skeletal muscles, joints, skin
Visceral: info we are generally unaware of from smooth muscles, cardiac muscle and 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: mostly voluntary of from the skeletal muscle
Autonomic: involuntary info to smooth muscle, cardiac muscle and 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 (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 neurons
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What type of neuron carries information from the CNS to effectors?
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motor neurons
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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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interneuron
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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= secrete, circulate,monitor |
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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 |
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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, cell bodies, dendrites
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What do we call bundles of neuron cell bodies found outside of the CNS?
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Ganglia
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