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Saltatory conduction and Myelination
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At what stages do Potassium (K+) Channels open?
Repolarization
(True or False) Along unmyelinated and myeliated neurons action potentials go along the axon
False
What is the name and function of structure A from the diagram?
Dendrites; receive stimuli
What is the name and function of structure D from the diagram?
Myelin sheath; increase the speed of signal transmission
What stage of action potential does point C on the diagram show?
Repolarization
At which point on the diagram does depolarisation of the axon occur?
B
A potential when the inner axon becomes really negative with the potential below resting is called as _____; it happened because of ___ ions efflux
hyperpolarization; K+
A potential when the inner axon becomes positive is called as _____; it happened because of ___ ions influx
depolarization; Na+
In resting potential, neurons have more _________ on the outside of the cell membrane.
Na+ (sodium)
Action potentials are only generated if the potential differences reach value aroun -55mV. This value is called as____
threshold potential
Movement of an action potential along a myelinated axon in which the action potential "jumps" from one node of Ranvier to the next is called as___
Saltatory conduction
(True or False) Depolarization does not occur in myelin sheath
True
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