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11 Cards in this Set
- Front
- Back
_______ cannot occur along a _____, because myelin increase resistance to the flow of ions across the membrane
|
continuous propagation
myelinated axon (saltatory propagation 1) |
|
_____ can readily cross the membrane only at _____
|
ions
nodes (saltatory propagation 2) |
|
when an ______ appears at the _______ of a myelinated axon, the local current _____ the internodes and _______ the node closest to the threshold
|
action potential
initial segment skips depolarizes (saltatory propagation 3) |
|
_____ from node to node – saltatory propagation
|
jumps
node saltatory (saltatory propagation 4) |
|
carries______ much more rapidly than _______ propagation
|
impulses
continuous (saltatory propagation 5) |
|
Myelination_____ coordination and control by decreasing the time between the _______ and the ______ of an appropriate response.
|
improves
reception of a sensation initiation (saltatory propagation 6) |
|
_________ begins at the initial segment
|
action potential
initial segment (continuous propagation 1) |
|
the_______becomes ______ rather than negative
|
transmembrane potential
positive negative (continuous propagation 2) |
|
a _______ then develops as ______ begin moving in the ______ and ______ – ________ propagation
|
local current
sodium ions cytosol and the extracellular fluid continuous (continuous propagation 3) |
|
each time a local current develops, the ________ moves_______, not backward because the_____ is still in absolute refractory
|
action potential
forward backward previous segment absolute refractory (continuous propagation 4) |
|
in _______ propagation, an action potential appears to _________ of a membrane in a series of______
|
continuous
move across the surface tiny steps (continuous propagation 5) |