For each phase of an action potential, indicate the ion channel most responsible for the membrane...
For each phase of an action potential, indicate the ion channel most responsible for the membrane potential change that occurs during the phase.
| Action Potential Phases | Ion Channels |
| Depolarization phase | |
| Repolarization phase | |
| Hyperpolarization phase |
Voltage-gated potassium channels
Chemically-gated sodium channels
Chemically-gated potassium channels
Voltage-gated sodium channels
Homework Answers
ANSWER:
DEPOLARISATION PHASE- Voltage gated sodium channel.
REPOLARISATION PHASE- Voltage gated potassium channel.
HYPERPOLARISATION PHASE- Chemically gated potassium channels.
Reason: Depolarisation is due to the opening of voltage gated sodium channels in which there is influx of sodium, and Depolarisation is due to the opening of voltage gated potassium channels. Hyperpolarisation results when these voltage gated potassium channels close and all leaky potassium channel opens.
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you identify the status (open/closed) of the voltage-gated Na+ and
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