The Signal That Crosses a Synapse Is Stopped When the

Multiple Choice

The signal that crosses a synapse is stopped when the

A) receiving cell runs out of sodium and is no longer able to respond to the stimulus.
B) receiving cell runs out of potassium and is no longer able to respond to the stimulus.
C) neurotransmitters are enzymatically broken down or transported back to the signaling cell.
D) neurotransmitters are actively transported into glia cells.