Strong stimuli cause the amplitude(size) of action potentials generated by the axon to increase. true or...

Strong stimuli cause the amplitude(size) of action potentials generated by the axon to increase. true or false

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Expert Solution

Answer : false.

Action potential is defined as the change in electrical potential associated with the passage of an impulse along the membrane of nerve cell or muscle cell. Action potential is caused by either threshold or suprathreshold stimus upon the neuron. Phases in action potential includes a)hypopolarization b) depolarization c)overshoot d) repolarization.

Action potentials do not vary in amplitude or intensity . They work on the principle of all or none. All or none principle states that , response of nerve or muscle fiber to stimulus is independent of the strength of the stimulus. if the stimulus exceeds threshold potential , the nerve or muscle fibres gives complete response otherwise there is no response.

Thus when there is stronger stimulus , the frequency in generation of action potential is increased , but the amplitude of action potential remains same. Thus our nervous system if frequency modulated but not amplitude modulated.The frequency of action potential is directly related to the strength of the stimulus.

Sydney Mullin answered 9 months ago

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