What is defined as the threshold of stimulus for nerves?

The term that describes the threshold of stimulus for nerves is known as action potential. This process is essential for the propagation of electrical signals along neurons. When a nerve is stimulated, it must reach a certain threshold level for the action potential to occur. This involves a rapid change in the electrical charge across the neuron’s membrane, initiating the transmission of the nerve impulse. If the stimulus is strong enough to exceed the threshold, an action potential is generated, allowing the nerve signal to travel along the axon.

Impulse refers to the actual signal that is transmitted once the action potential has been generated, but it does not define the threshold of the stimulus itself. A synapse refers to the junction between two neurons where communication occurs, and the terminal button is the structure that releases neurotransmitters into the synapse. Neither of these terms encapsulates the concept of the threshold needed for stimulation of nerves.