PATHOLOGY

PATHOLOGY MCQ

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The Nodes of Ranvier exist because ____
A
it speeds up the message sent along the axon
B
schwann cells aren’t large enough to cover the whole axon
C
the neurons get damaged and gaps form
D
it’s a side effect of the way the neuron is developed
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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