Stimuli that are too insignificant to produce a spike set up a local electron movement, however, gradually it increases the magnitude of the electronic potential with the amplitude of the stimulation until a spike is produced. The unit for nervous tissue is the nerve cell the unit for skeletal muscle is the actual muscle fiber, and for the heart, the whole auricles or the whole ventricles forms the unit. The 'all-or-none' principle refers to the roughly accurate concept that neurons fire all-or-none action potentials, individual muscle fibers contract fully or not at all, etc. If the stimulus exceeds the threshold potential, the nerve or muscle fiber will give a complete response otherwise, there is no response. This relationship is applicable only to the tissue unit. 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. This attribute of the single nerve fiber is called the all-or-none relationship. If the single fiber does not react with the output of the spike, or it responds to the highest efficiency under the conditions in the provided time period. If strength of threshold stimulus is above a maximal amplitude, a spike (a nervous impulse) is set up. There is an absence of induction of a propagated spike potential by electrical stimulation that is below threshold power. The intensity of the action potential that is formed in any single nerve fiber is independent of the frequency of the exciting stimuli, as long as above threshold stimulus is present. The property of cardiac muscle in which stimulation from a single myocyte travels to the atrium and ventricle before contracting, resulting in a coherent and co.
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