The "all-or-none" principle means that
- A
A neuron's firing strength varies smoothly with stimulus intensity, scaling with input
- B
Inhibitory neurons cannot reach action potential threshold under any circumstances
- Ccheck_circle
A neuron either fires at full strength or not at all once threshold is reached
- D
Neurons must always fire in coordinated pairs to transmit any meaningful signal
Explanation
Once threshold is reached, the action potential is fixed in strength; intensity is coded by frequency, not amplitude.