Final answer:
Only item C (inactivation gate - opens during repolarization) is incorrectly matched as the inactivation gate actually closes during depolarization and then reopens after repolarization. Items A, B, and D are correctly matched. The correct option is E) All of the above are incorrectly matched
Step-by-step explanation:
The student's question asks for the identification of incorrectly matched items regarding the behavior of ion channels during an action potential. According to the information provided, the following statements can be assessed:
- A) activation gate - closed at rest (Correctly matched)
- B) inactivation gate - open at rest (Correctly matched)
- C) inactivation gate - opens during repolarization (This is incorrect - the inactivation gate closes during depolarization and reopens after repolarization is complete)
- D) activation gate - opens during depolarization (Correctly matched)
Only item C is incorrectly matched; all other items are correct. The action potential relies on the correct timing of the opening and closing of the activation and inactivation gates of voltage-gated Na* channels. Repolarization instead requires voltage-gated K* channels, which have only one gate that opens slower than the Na* channels. The correct option is E) All of the above are incorrectly matched