The signal that crosses a synapse is stopped when
A)a second action potential traveling down the signaling cell "sounds a retreat," and the neurotransmitters return to the signaling cell.
B)the responding cell runs out of sodium and is no longer able to respond to the stimulus.
C)the responding cell runs out of potassium and is no longer able to respond to the stimulus.
D)the neurotransmitter is enzymatically broken down or transported back to the signaling cell.

Question

Quizplus · Accepted Answer

The neurotransmitter is either broken down by enzymes or transported back to the signaling cell, which stops the signal transmission across the synapse. This prevents the continuous stimulation of the responding cell and maintains the integrity of the signaling pathway. Options A, B, and C do not accurately describe the process of synaptic transmission.

The Signal That Crosses a Synapse Is Stopped When