When was a characteristic
of the Roman senate

Explanation: The Senate was the governing and advisory assembly of the aristocracy in the ancient Roman Republic. It was not an elected body, but one whose members were appointed by the consuls, and later by the censors. After a Roman magistrate served his term in office, it usually was followed with automatic appointment to the Senate. According to the Greek historian Polybius, our principal source on the Constitution of the Roman Republic, the Roman Senate was the predominant branch of government.

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse