Term
|
Definition
an increase in membrane potential
away from zero that reduces the
probability of producing a nerve
impulse |
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Term
|
Definition
paired spinal and crainial nerves
that carry messages to and from the
CNS |
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Term
|
Definition
division of ANS that mobilizes body
systems during activity |
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Term
|
Definition
nongated membrane ion channels
that are always open |
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Term
|
Definition
dense collections of myelinated
fibers |
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Term
|
Definition
gaps between adjacent schwann
cells where axon collaterals can
emerge |
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Term
|
Definition
sensory division that conveys
sensation information to CNS |
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Term
|
Definition
potential difference across the
membrane of a resting cell
generated by the differences in ionic
makeup of the ICF and ECF |
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Term
|
Definition
division of PNS that is voluntary
conscious control of skeletal muscle |
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Term
|
Definition
type of integration summation where
a postsynaptic neuron is stimulated
by a large number of terminals at
the same time |
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Term
|
Definition
a reduction in membrane potential
toward zero that increases the
probability of a nerve impulse |
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Term
|
Definition
membrane potential that represents
short-distance incoming signals |
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Term
|
Definition
cells that suround peripheral nerve
fibers and form the myelin sheaths |
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Term
|
Definition
protein that binds Ca2+ and
promotes the fusion of synaptic
vesicles with an axon membrane |
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Term
|
Definition
transmits inpulses from CNS to
organs |
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Term
|
Definition
| interpretation of sensory input |
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Term
|
Definition
division of ANS that promotes
housekeeping function during rest |
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Term
|
Definition
| excitatory postsynaptic potenetial |
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Term
|
Definition
chemical class of nerotransmitters
that includes dopamine,
epinephrine, and norepinephrine |
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Term
|
Definition
synapse between the axon from one
neuron and the dendrite of another |
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Term
|
Definition
membrane ion channel that opens
and closes in response to changes
in membrane potential |
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Term
|
Definition
mostly neuron cell bodies and
unmyelinated fibers |
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Term
|
Definition
information gathered by sensory
receptors about external and
internal changes |
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Term
|
Definition
membrane ion channels that open
and close in response to physical
deformation of receptors |
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Term
|
Definition
involuntary division of PNS that
regulates involuntary muscle
contractions such as cardiac and
gland functions |
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Term
|
Definition
chemically mediated channel that
opens with the binding of a specific
neurotransmitter chemical |
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Term
|
Definition
type of active transport that
describes the presynaptic release of
neurotransmitters |
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Term
|
Definition
type of indirect neruotransmiitter
action that results in secondary
message such as cAMP |
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Term
|
Definition
fluid filled space separating the
presynaptic and postsynaptic
neurons that prevents nerve
inpulses from directly passing from
one neuron to the next |
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Term
|
Definition
type of integration summation where
one or more presynaptic neruons
transmit impulses in rapid fire order |
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Term
|
Definition
activation of effector organs and
produces a response |
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Term
|
Definition
a juction that mediates information
transfer from one neuron to another
neuron or to an effector cell |
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Term
|
Definition
phenomenon that describes how an
action potential happens either
completely or not at all |
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