EVERYDAY SCIENCE

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: -noun Physiology. the principle that under given conditions the response of a nerve or muscle fiber to a stimulus at any strength above the threshold is the same: the muscle or nerve responds completely or not at all.

Detailed explanation-3: -No matter what the intensity or duration of a stimulation, a nerve or muscle will respond completely or not at all. The all or none law is a description of the natural observable phenomenon that a nerve will fire with the same intensity regardless of the starting impulse.

Detailed explanation-4: -The ‘All or None’ Law Each fibre within a motor unit contracts according to 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: -noun. : a principle in physiology: in any single nerve or muscle fiber the response to a stimulus above threshold level is maximal and independent of the intensity of the stimulus.