SCIENCE
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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it speeds up the message sent along the axon
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schwann cells aren’t large enough to cover the whole axon
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the neurons get damaged and gaps form
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it’s a side effect of the way the neuron is developed
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Detailed explanation-1: -Nodes of Ranvier are absolutely essential for rapid, faithful, and efficient AP conduction in the nervous system. Although these structures have traditionally been viewed simply as passive contributors to AP propagation, recent work has begun to show that nodes play an active role in regulating neuronal excitability.
Detailed explanation-2: -Action potentials travel down the axon by jumping from one node to the next. Nodes of Ranvier are gaps in the myelin along the axons; they contain sodium and potassium ion channels, allowing the action potential to travel quickly down the axon by jumping from one node to the next.
Detailed explanation-3: -Nodes of Ranvier are microscopic gaps found within myelinated axons. Their function is to speed up propagation of action potentials along the axon via saltatory conduction.
Detailed explanation-4: -Summary. Myelin can greatly increase the speed of electrical impulses in neurons because it insulates the axon and assembles voltage-gated sodium channel clusters at discrete nodes along its length. Myelin damage causes several neurological diseases, such as multiple sclerosis.