Question

Which of the following is a type of neural propagation that requires the myelin sheath?

A. Saltatory conduction
B. Continuous conduction
C. Repetitive conduction
D. Temporal summation

Answer 1

Saltatory conduction is the type of neural propagation that requires the myelin sheath, allowing action potentials to 'jump' from node to node and increasing the speed of neural communication.

Step-by-step explanation:

The type of neural propagation that requires the myelin sheath is saltatory conduction. Myelin acts as an insulator, preventing current from leaving the axon, thus significantly increasing the speed of action potential propagation.

In contrast, continuous conduction occurs along an unmyelinated axon and is slower because voltage-gated Na+ channels must open across the entire length of the axon, resulting in a continuous wave of depolarization. The presence of the myelin sheath enables saltatory conduction, where action potentials 'jump' from one node of Ranvier to the next, renewing the depolarized membrane through a new influx of Na+.

Answer 2

The neural propagation that requires the myelin sheath is known as saltatory conduction, where the action potential 'jumps' from node to node, leading to faster and more efficient transmission compared to the slower continuous conduction in unmyelinated axons.Hence, the mentioned correct option in the final answer is A.

Step-by-step explanation:

The type of neural propagation that requires the myelin sheath is saltatory conduction.

In saltatory conduction, the action potential rapidly jumps from one node of Ranvier to the next. Myelin acts as an insulator, enabling this quick transmission and preventing current leakage, significantly increasing conduction speed compared to continuous conduction, which occurs in unmyelinated axons and entails a slower, steady spread of the action potential.

As ion channels are concentrated at the nodes, saltatory conduction is much more efficient and saves energy for the neuron. Saltatory conduction.