Nervous System Basics
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each of the black spaces below before clicking
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Nervous system function/purpose: | control body's actions & senses.
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How does the nervous system control the body? | collects sensory information, processes & interprets information, & initiates a response.
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The Central Nervous System (CNS) consists of: | cell bodies, axons, & dendrites.
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A cell body consists of: | a nucleus & organelles.
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Axons are: | elongated projections that carry signals AWAY from a cell body. They may have branches (called collaterals) to comminicate with many neurons.
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Dendrites: | are extentions of a cell's cytoplasm, which carry signals TO the cell body.
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The space or junction between two neurons (or neuron and organ) is called a: | synapse/synaptic cleft.
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The electrical nerve impulse transformes into what kind of signal? | chemical (neurotransmitter).
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Why is the electrical signal transformed into chemical? | to cross the synapse/junction.
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The neuron sending the signal across is: | presynaptic.
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The neuron or organ recieving the signal is: | post-synaptic.
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How many neurotransmitters have been identified? | over 30.
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Main neurotransmitters: | Acetylcholine, catecholamines, cholecytokinin, endorphine.
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Acetylcholine | stimulates the skeletal muscles
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Catecholamines | Epinephrine, norepinephrine, dopamine, histamine, & serotonin are involved in sleep, motor function, mood, & pleasure.
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Epinephrine, norepinephrine, dopamine, histamine, & serotonin are: | Catecholamines (involved in sleep, motor function, mood, & pleasure)
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Created by:
Sonhos
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