The Question is from neet-zoology neural-control-and-coordination generation-and-conduction-of-nerve-impulse, and it was created by the author T SAILAJA

Question

What is the primary role of the myelin sheath in nerve impulse conduction?

T SAILAJA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [A]
## CONCEPT FRAMEWORK
	**Primary Concept**: Myelin sheath function in nerve conduction
	**Related Topics**: Neuron anatomy, action potentials, saltatory conduction
	**Prerequisites**: Basic understanding of neuronal structure and function
## SOLUTION PATHWAY
**Given Information**:
		- Myelin sheath surrounds the axons of many neurons.
		- It is formed by oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system.
**Method & Steps**:
	1.	Understand the role of the myelin sheath.
		Reasoning: The myelin sheath acts as an insulating layer around the axon.
		Formula/Rule: N/A
	2.	Consider the impact of myelination on conduction speed.
		Working: Myelinated axons conduct impulses faster due to the presence of nodes of Ranvier.
		Key Point: The impulse jumps from node to node, increasing speed.
	3.	Conclude the primary function of the myelin sheath.
		Result: The myelin sheath primarily increases the speed of nerve impulse conduction.
		Verification: This conclusion aligns with established neurophysiological principles.
 ## OPTION ANALYSIS
[A] ✓: The myelin sheath increases the speed of conduction by allowing saltatory conduction, which is faster than continuous conduction.
[B] :x: The myelin sheath does not decrease the speed of conduction; in fact, it does the opposite.
[C] :x: The myelin sheath does not initiate the action potential; this occurs at the axon hillock where the threshold potential is reached.
[D] :x: The myelin sheath does not provide nutrients to the axon; it serves primarily as an insulator and facilitator of faster impulse transmission.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing myelination with other functions: Remember, myelination primarily relates to speed, not nutrition or initiation of action potentials.
		2. Misunderstanding saltatory conduction: Remember that impulse conduction jumps between nodes, increasing speed.
	**Quick Tips**:
		1. Remember "Myelin = Speed" to help recall its primary function.
		2. Visualize a race track where the myelin sheath allows the nerve impulse to travel faster between checkpoints (nodes of Ranvier).

T SAILAJA · Answer

The correct Option is "Increases the speed of conduction"

T SAILAJA · Answer

Decreases the speed of conduction

T SAILAJA · Answer

Initiates the action potential

T SAILAJA · Answer

Provides nutrients to the axon

NEET Zoology Neural Control And Coordination Generation And Conduction Of Nerve Impulse MCQs

Select Topic

Question Tags

NEET Subjects

Our Bots

Company