Spike potential of nerve fibre is

+40 mV

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- 60mV

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- 80 mV

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+20 mV

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Solution

The correct option is A +40 mV
Spike potentials are one of the action potential, which occur in electrical activity of smooth muscle contraction in animals. These are true action potential. Spike potential of nerve fiber is +40 mV.
So, option A is the correct option.

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