PHYSIOLOGY
NEUROTRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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These narrow gaps between the sections of myelin sheaths on an axon are known as ____ The benefit of these sheaths it to promote and speed up “jumping” of nerve impulse down the axon.
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collateral branches
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nodes of Ranvier
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ependymal points
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neural switches
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Explanation:
Detailed explanation-1: -Each gap in the myelin sheath-between internodes-is called the nodes of Ranvier. The nodes of Ranvier are rich in positive sodium ions. As the electrical signal or impulse travels along the axon, it jumps from one node to the next.
Detailed explanation-2: -To elaborate, the gap between two myelinated parts of an axon is called the node of Ranvier. The phenomenon where a nerve impulse jumps from one node of Ranvier to another is called saltatory conduction.
Detailed explanation-3: -The myelin sheath wraps around the axon but also leaves small gaps called the nodes of Ranvier. The action potential jumps from node to node as it travels down the axon.
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