AP PSYCHOLOGY

Detailed explanation-1: -In physiology, the all-or-none law (sometimes the all-or-none principle or all-or-nothing law) is the principle that if a single nerve fibre is stimulated, it will always give a maximal response and produce an electrical impulse of a single amplitude.

Detailed explanation-2: -According to the all-or-none law, there will either be a full response or no response at all for an individual neuron or muscle fiber.

Detailed explanation-3: -A type of response that may be either complete and of full intensity or totally absent, depending on the strength of the stimulus; there is no partial response.

Detailed explanation-4: -The ‘All or None’ Law This principle states that when a motor unit receives a stimulus of sufficient intensity to bring forth a response, all the muscle fibres within the unit will contract at the same time, and to the maximum possible extent.

Detailed explanation-5: -all-or-none law, a physiological principle that relates response to stimulus in excitable tissues. It was first established for the contraction of heart muscle by the American physiologist Henry P. Bowditch in 1871.