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The speed of impulse conduction along an axon may be increased by?
Wiki User
∙ 12y ago
By myelin sheath.
Wiki User
∙ 12y ago
Elsis Arevalo
Myelin sheaths
Cortney Runolfsdotti...
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A factor that determines the rate of impulse propagation or conduction velocity along an axon?
The speed at which neural impulses are transmitted. Diameter of the axon Degree of myelination of the axon
The speed at which a neural impulse travels is increased when the axon is encased by an?
myelin sheath
What is the myelin sheath's function?
The function of the myelin sheath is to insulate the axon of the neuron. When there are gaps in the sheath, known as nodes of Ranvier, the nerve impulse can jump from gap to gap, thus increasing greatly the speed of conduction of the nerve impulse. This is known as saltatory conduction.
What the function of the myelin sheath?
The function of the myelin sheath is to insulate the axon of the neuron. When there are gaps in the sheath, known as nodes of Ranvier, the nerve impulse can jump from gap to gap, thus increasing greatly the speed of conduction of the nerve impulse. This is known as saltatory conduction.
What is the effect of the myelin sheath on synaptic transmission?
Myalin sheath gives insulation to the neurons. They also hasten the nerve conduction by saltatory conduction.
Does the presence of the nodes of ranvier speed up velocity of conduction along the axon?
True
What do nerve conduction velocity studies?
Nerve conduction velocity studies (NCV) are used to measure the speed with which an electrical signal is transferred along the nerve.
What is the speed of an impulse?
Impulse speed is 1/4 lightspeed, or 270 million km/h.
What is the gap called that separates the myelin sheaths?
The gap between myelin sheaths is called the node of Ranvier. These nodes are important for enhancing the speed of nerve impulse transmission along the axon by allowing action potentials to "jump" between them in a process known as saltatory conduction.
What structure of the conduction system helps to cause the constriction of the ventricles and extend from the atrioventricular node?
The conduction speed slows when it reaches the bundle of His, and then speeds up as it travels along the Purkinje fibres to the base of the ventricles.
Would conduction speed of a nerve fiber be the fastest in a large or small myelinated fiber?
Yes. Myelinated fibers have a myelin sheath around them which keeps the impulse from scattering and on a direct path. This makes the impulse travel faster than unmyelinated fibers.
Does convection or conduction travel at the speed of light?
No. The speeds of convection and conduction vary, but they are nowhere near the speed of light.
