After a Nerve Impulse Occurs, the Neuron Is Temporarily Less

question 9

Multiple Choice

After a nerve impulse occurs, the neuron is temporarily less likely to fire because

• A) the cell is still above its resting level.
• B) potassium ions flow out of the neuron while the membrane gates are open.
• C) acetylcholine acts as an inhibitor.
• D) a positive after-potential has occurred.

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Definitions:

Circulatory System

The body's system responsible for transporting blood, nutrients, gases, and waste products, and includes the heart and blood vessels.

Amphibian

A class of cold-blooded vertebrates that live both in water (as larvae or tadpoles) and on land (as adults), including frogs, toads, and salamanders.

Oxygen-rich

Describes an environment or substance containing high levels of oxygen, often associated with well-oxygenated blood and atmospheres conducive to aerobic life forms.

Oxygen-poor

A condition or environment where the concentration of oxygen is significantly lower than the average.