_______ (Reduction of the Resting Potential) of an Axon Until

question 15

Multiple Choice

_______ (reduction of the resting potential) of an axon until it reaches a threshold value opens voltage-gated sodium (Na⁺) channels, making the membrane completely _______ to sodium ions (Na⁺) . The Na⁺ ions rush in, and the axon becomes briefly more positive inside than outside. This event is called an _______.

• A) Depolarization; permeable; action potential
• B) Upregulation; impermeable; action potential
• C) Up-polarization; permeable; adverse reaction
• D) Deregulation; impermeable; adverse reaction

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