Ordinarily, a neuron’s trigger zone is activated before any other part ofan axon, so a wave of action potentials occurs as sodium channelsopen in the direction of the synaptic terminal. What would happen ifyou artificially stimulated an axon to reach threshold potential midwayalong its length rather than at the trigger zone?a. Action potentials would occur in the direction of the synapticterminal.b. No action potentials would occur.c. Action potentials would occur in the direction of the trigger zone.d. Both a and c are correct.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Ordinarily, a neuron’s trigger zone is activated before any other part of
an axon, so a wave of action potentials occurs as sodium channels
open in the direction of the synaptic terminal. What would happen if
you artificially stimulated an axon to reach threshold potential midway
along its length rather than at the trigger zone?
a. Action potentials would occur in the direction of the synaptic
terminal.
b. No action potentials would occur.
c. Action potentials would occur in the direction of the trigger zone.
d. Both a and c are correct.

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