What Is Thought to Cause the Sodium Channels That Initiate

question 65

Multiple Choice

What is thought to cause the sodium channels that initiate an action potential to be inactivated for a brief time after being open for about 1 msec?

• A)a higher positive charge
• B)a higher negative charge
• C)the random diffusion of an inactivation peptide into 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

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