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25 Cards in this Set
- Front
- Back
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The nervous system is made up of?
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CNS and PNS
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What is the PNS made of?
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somatic and visceral nervous system
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The SNS controls what?
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the body (skin,muscles, bone)
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The Somatic NS is made up of ?
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the somatic motor and the somatic sensory
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What does the somatic motor control?
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voluntary muscle
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What does the somatic sensory control?
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specific sensation such as temp, pain, touch: hearing, vision, and equilibrium
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What does the visceral nervous system control?
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organs
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What are the two divisions of the visceral nervous system?
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visceral motor and visceral sensory
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visceral motor
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an autonomic nervous system, divided into the parasympathetic (rest and digest) and sympathetic (fight or flight)
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the visceral sensory
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generalized sensation, taste, and smell
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What is the basic structural unit of the nervous system?
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neuron
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neuron
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highly specialized cell that conducts electrical signals from one part of the body to another
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What are electric signals called?
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nerve impulses or action potentials
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Parts of the neuron?
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dendrites, soma, axons, axon terminals
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dendrites
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parts of the neuron that receive a signal then transmits it toward the cell body
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soma
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contains the nucleus and organelles needed for normal function
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axons
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parts of the neuron that transmits a signal away from the cell body
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axon terminals
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parts of the neuron that release a secretory component (usually a neurotransmitter) onto target effectors or another neuron
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Three main neurotransmitters?
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acetylcholine
norepinephrine glutamate |
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acetylcholine
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neuromuscular junction involved in skeletal muscle movement, also supplies salivary glands
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norepinephrine
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sweat gland and smooth muscle, also released from adrenal glands. it is the principal neurotransmitter in vasoconstriction of blood vessels
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glutamate
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largely a CNS neurotransmitter
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What are the three structural classfications of a neuron and which ones are mylinated
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unipolar, multipolar (myelinated)
bipolar |
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afferent
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carries to or toward, a nerve fiber that carries impulses toward the CNS.. afferent nerves are sensory neurons
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efferent
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carrying away or away from, away from the CNS..efferent neurons are motor neurons
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