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Mamillian control and coordination
nervous system
nerve impulses
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Myelination
Biology (A2) > Control and coordination (15) > Mamillian control and coordination > nervous system > nerve impulses
8 cards
Resting potential
Biology (A2) > Control and coordination (15) > Mamillian control and coordination > nervous system > nerve impulses
2 cards
Cards (12)
Transmissions of nerve impulses
Neurons transmit electrical impulses
which
travel extremely quickly along
the
neurons cell surface membrane from one end of
the
neuron to another
Unlike
a
normal electric current, these impulses are
not a
flow
of
electrons
These impulses are known
as
action
potentials. They occur via very brief changes in distribution of electrical charge across the CSM
Action potentials are
caused
by the
rapid
movement of sodium ions and
potassium
ions across the membrane of the axon
Speed of conduction of impulses
Speed of conduction of an impulse refers to how quickly the impulse is transmitted along a neuron
Determined by
two
main factors
Presence of
absence
of myelin
Diameter
of the axon
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