The signal that crosses a synapse is stopped when

Question

Quizplus · Accepted Answer

When a signal crosses a synapse, neurotransmitters are released from the signaling cell and bind to receptors on the responding cell. The neurotransmitters are then either enzymatically broken down or transported back to the signaling cell to stop the signal. This process is known as reuptake. Option A and C are incorrect because the running out of sodium or potassium by the responding cell is not the cause of the signal being stopped. Option D is incorrect as there is no such signaling mechanism of the neurotransmitters returning to the signaling cell due to a second action potential.

The Signal That Crosses a Synapse Is Stopped When