PATHOLOGY MCQ
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The Nodes of Ranvier exist because ____
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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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Explanation:
Detailed explanation-1: -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-2: -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.
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