As the action potential (AP) propagates away from the axon hillock, why does it continue in one direction (downstream)? the region behind the AP is in absolute refractory period the region in front of the AP is in absolute refractory period they travel the path of least resistance the region behind the AP runs out of NA+ ions Both A and B

As the action potential (AP) propagates away from the axon hillock, why does it continue in one direction (downstream)? the region behind the AP is in absolute refractory period the region in front of the AP is in absolute refractory period they travel the path of least resistance the region behind the AP runs out of NA+ ions Both A and B

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

As the action potential (AP) propagates away from the axon hillock, why does it
continue in one direction (downstream)?
the region behind the AR is in absolute refractory period
the region in front of the AP is in absolute refractory period
they travel the path of least resistance
the region behind the AP runs out of NA+ ions
Both A and B

Expert Solution

Step 1:

Action potentials, those electrical impulses that go throughout the body, are nothing more than a brief change in the membrane potential of the neuron brought on by ions that are suddenly streaming into and out of the cell.