99.4k views
3 votes
An action potential in one segment of axon causes adjacent sections of axon membrane to reach threshold through what mechanism?

Na+ ions diffusing across the membrane through leakage channels the generation of local currents
K+ ions diffusing through voltage-gated channels neurotransmitters causing chemically gated channels to open

1 Answer

5 votes

Answer:

Na+ ions diffusing across the membrane through leakage channels the generation of local currents

Step-by-step explanation:

An action potential occurs when the membrane potential of a specific cell location rapidly rises and falls. There is a voltage difference between the exterior and interior of the cell, called the membrane potential, due the Na+/K+ ATPase pump.

Starting from the resting potential, the action potential starts when the thershold is reached when Na+ ions difusse across the membrane through channels.Then, the interior of the cell becomes positive and the exterior negative.

The K+ channels take place when the repolarization phase stars, letting K+ ions difusse from the inside of the cells to the exterior.

User Sanjsanj
by
7.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.