What Is Thought to Cause the 1 Ms Inactive Time

Multiple Choice

What is thought to cause the 1 ms inactive time after a sodium channel initiates an action potential?

A) a higher positive charge
B) a higher negative charge
C) the presence of an inactivating peptide in the opening of the channel pore
D) removal of a peptide from the channel protein
E) covalent addition of a peptide to the cytoplasmic end of the channel protein