Neural Control and Coordination · NEET Preparation Zoology
In a myelinated axon, rapid conduction of an action potential is mainly due to:
Practice question from Neural Control and Coordination (NEET Preparation Zoology), with the correct answer and a step-by-step solution.
easy · MCQ · Q-BFFCA4
In a myelinated axon, rapid conduction of an action potential is mainly due to:
- A.Continuous depolarisation along the entire axonal membrane
- B.Saltatory conduction of the impulse between successive nodes of RanvierCorrect answer
- C.Movement of neurotransmitters through the myelin sheath
- D.Absence of ion channels at the nodes of Ranvier
Solution
In myelinated axons, ion exchange occurs mainly at the nodes of Ranvier. The impulse appears to jump from one node to the next, a process called saltatory conduction, which greatly increases conduction velocity.
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