AP PSYCHOLOGY

Detailed explanation-1: -The all-or-none law is a principle that states that the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.

Detailed explanation-2: -the principle that the amplitude of the action potential in a neuron is independent of the magnitude of the stimulus.

Detailed explanation-3: -There are no big or small action potentials in one nerve cell-all action potentials are the same size. Therefore, the neuron either does not reach the threshold or a full action potential is fired-this is the “ALL OR NONE” principle. Action potentials are caused when different ions cross the neuron membrane.

Detailed explanation-4: -The all-or-none law is the principle that the strength by which a nerve or muscle fiber responds to a stimulus is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fiber will give a complete response; otherwise, there is no response.