If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________.
A) the impulse would move to the axon terminal only, and the muscle contraction would occur
B) the impulse would move to the axon terminal only
C) muscle contraction would occur
D) the impulse would spread bidirectionally

Question

Quizplus · Accepted Answer

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon, the impulse would spread bidirectionally. This means that the impulse would travel both towards the axon terminal and towards the soma of the neuron. However, the muscle contraction would not occur unless the impulse reaches the axon terminal and triggers the release of neurotransmitters that stimulate the muscle fibers.

If a Motor Neuron in the Body Were Stimulated by an Electrode