Which of the following cardiac effects can be | vedclass

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(D) The correct answer is $D$. When the extracellular potassium concentration increases to $2-3$ times the normal value,it causes a decrease in the re

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(D) The correct answer is $D$. When the extracellular potassium concentration increases to $2-3$ times the normal value,it causes a decrease in the resting membrane potential of cardiac muscle fibers. This depolarization makes the heart muscle weak,leads to abnormal rhythms (arrhythmias),and if the concentration remains high,it can eventually lead to cardiac arrest and death.

Which of the following cardiac effects can be observed if the potassium concentration is increased two to three times the normal value?

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