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Q What change does not occur when a stimulus is applied to a polarized axonal membrane?

ID: #8768 Nervous System 200 views
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#8768Q ID
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Nervous SystemTopic
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  • A The membrane becomes permeable to sodium ions ✔ ✖
  • B The membrane is depolarized ✔ ✖
  • C There is a slow influx of sodium ions ✔ ✖
  • D The outer surface of the membrane becomes negatively charged ✔ ✖
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Explanation

When a stimulus is applied to a polarized axonal membrane, there is a rapid influx of sodium ions into the membrane, which makes it permeable to sodium ions. This results in depolarization of the membrane, which means that the membrane potential becomes less negative. However, option C states that there is a slow influx of sodium ions, which is incorrect. The correct answer is option C.

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