A neuron is experimentally stimulated with electrical pulses of increasing intensity. At low intensities, no action potential is recorded. Once a critical level of stimulation is reached, an action potential is generated, and further increases in stimulus strength do not change its size.
Which principle best explains this observation?

Question

A neuron is experimentally stimulated with electrical pulses of increasing intensity. At low intensities, no action potential is recorded. Once a critical level of stimulation is reached, an action potential is generated, and further increases in stimulus strength do not change its size.

Which principle best explains this observation?

Answer

All neurons respond identically to any electrical stimulus applied.

Answer

Stronger stimuli selectively activate larger motor neurons.

Answer

Action potential amplitude increases in proportion to stimulus intensity.

Answer

Once threshold is reached, action potentials are produced with a fixed amplitude regardless of stimulus strength

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A neuron is experimentally stimulated with electrical pulses of increasing inte...

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