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Which of the following is TRUE of the absolute refractory period? a) It establishes the maximum frequency...

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Medical Sciences

Which of the following is TRUE of the absolute refractoryperiod?

a) It establishes the maximum frequency with which a nerve cellcan conduct action potentials

b) It does not end until the Na+/K+ pump has restored the ionsto their original locations

c) It establishes the maximum number of graded potentials thatcan summate

d) Two of the above are correct

d) a) b) and c) are correct

Please provide an explanation. Thank you.

Answer & Explanation Solved by verified expert
4.3 Ratings (622 Votes)
Option A It establishes the maximum frequency with which a nerve cell can conduct action potentials opening of the Na channels spontaneously and rapidly leads to their inactivation At the peak of the action potential all Na channels become inactivated When Na channels are inactivated they cannot be immediately opened again see figure on Na channel inactivation    See Answer
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