A Neuron Is Exposed to a Drug That Completely Blocks

question 16

Multiple Choice

A neuron is exposed to a drug that completely blocks voltage-gated potassium channels, but has no effect on non-gated channels or the sodium-potassium pump. Which of the following describes the effect on action potential generation?

• A)Threshold will never be crossed, and therefore an action potential will never be generated.
• B)Repolarization will never occur after threshold is crossed and sodium will continue to flow into the neuron.
• C)Repolarization will still occur, but at an inefficiently slow rate.
• D)Resting potential would not be maintained, as potassium could not leak out of the neuron.

---

Definitions:

Common Law Rule

A legal principle that emerges from court decisions over time rather than from statutes or constitutions, forming part of the common law legal system.

Criminal Act

A criminal act is an action or omission that constitutes an offense punishable by law.

Fifth Amendment

An amendment to the U.S. Constitution that provides several protections to individuals, including against self-incrimination and double jeopardy.

Self-Incrimination

The act of implicating oneself in a crime, which is protected against under the Fifth Amendment of the U.S. Constitution, allowing individuals to refuse to testify against themselves.