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22 Cards in this Set
- Front
- Back
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myelin sheaths |
1) allow for the conduction of nerve impulses (action potentials) to be transmitted faster 2)covers axons in the central and peripheral nervous system 3)are composed of a whitish, fatty material |
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the spaces between each myelin sheath are called |
Nodes of ranvier |
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myelin sheaths are produced by which neuroglia cells |
oligodendrocytes |
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T/F the action potential is transmitted from the cell body |
T |
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T/F dendrites pass info from the neuron to another cell |
F |
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True statements regarding Action potentials (nerve impulses) |
1)neurons create action potentials when they are adequately stimulated 2)once started the cannot be stopped or reversed 3)typically are only generated in the axon portion of a neuron 4)when action potentials reach the axon terminal, they cause the release of neurotransmitters |
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sensory (afferent) neurons |
Transmit info form the peripheral nervous system to the central nervous system |
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Sensory (afferent) and Motor (efferent) are considered part of what nervous system |
Peripheral |
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Motor efferent neurons |
Transmit info from the CNS to the PNS |
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The generation or creation of an Action potentials depends on what? |
the strength of the stimulus a neuron receives |
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neurotransmitter are released from the ______________ |
Axon terminals |
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the nucleus of the neuron is located in the _______ |
Cell body sonma |
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Synaptic Cleft |
Separates the presynaptic and postsynaptic neuron membranes |
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The binding of a neurotransmitter can cause? |
Either an excitatory or inhibotory effect |
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Binding of a neurotransmitter on the postsynaptic neuron can generate a ____________ |
Action potential in that neuron
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T/F a Neurotransmitter bound to a postsyamptic neuron membrane will affect its permeability of certain ions |
T |
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The resting membrane potential of a neuron, specifically in the axon, is More/less negatively charged inside when compared to the extracellular space (outside the cell? |
More |
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Depolarization
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the reduction of the membrane potential; going from negative to a more positive charge
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How do neurons communicate |
through Action potentials and the release of neurotransmitters |
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During the repolarization phase of an action potential, the neuron begins to regain its _______ |
Negative internal charge |
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Motor efferent division of the nervous system |
1) part of the perpheral nervous system 2)transmits info from the cns to the body 3)provides innervation to the muscles of the body |
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T/F During relative refractory period, a neuron cannot create another action potential to a stimulus no matter how strong or intense that stimulus is. |
F |
