How does the membrane potential recover from hyperpolarization?
Understand the Problem
The question asks about the process by which the membrane potential of a cell returns to its resting state after a period of hyperpolarization (where the membrane potential is more negative than its resting potential). This involves understanding the ion channels and pumps responsible for maintaining and restoring the electrochemical gradient across the cell membrane.
Answer
The neuron returns to resting potential as potassium channels close, and natural sodium and potassium permeability is restored.
Following hyperpolarization, the neuron returns to its resting potential through the closing of potassium channels and the natural permeability of the neuron membrane to sodium and potassium ions.
Answer for screen readers
Following hyperpolarization, the neuron returns to its resting potential through the closing of potassium channels and the natural permeability of the neuron membrane to sodium and potassium ions.
More Information
The sodium-potassium pump also helps to maintain the resting membrane potential by actively transporting sodium ions out of the neuron and potassium ions into the neuron.
Tips
A common mistake is to assume that a single mechanism is responsible for recovery. Both ion channel activity and the sodium-potassium pump contribute.
Sources
- Hyperpolarization (biology) - en.wikipedia.org
- Q & A: Neuron depolarization, hyperpolarization, and action potentials - khanacademy.org
AI-generated content may contain errors. Please verify critical information
