If a neuron's membrane potential measures +25mV, the neuron is __________Blank.Multiple Choicedepolarizedhyperpolarizedrepolarizedpolarized
Question
If a neuron's membrane potential measures +25mV, the neuron is __________
Multiple Choice
- depolarized
- hyperpolarized
- repolarized
- polarized
Solution
The correct answer is depolarized.
Explanation
- A neuron is considered depolarized when its membrane potential is higher than the resting potential (typically around -70 mV). A +25 mV membrane potential indicates that the inside of the neuron is more positively charged than at rest, signifying depolarization.
- In contrast:
- Hyperpolarized means the membrane potential has become more negative than the resting potential.
- Repolarized refers to the restoration of the membrane potential to the resting state after depolarization.
- Polarized generally refers to a neuron at its resting potential.
Therefore, with a membrane potential of +25 mV, the neuron is clearly depolarized.
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