Immediately After an Action Potential Has Peaked, Which of the Following

question 17

Multiple Choice

Immediately after an action potential has peaked, which of the following channels will open?

• A) voltage-gated calcium channels
• B) voltage-gated sodium channels
• C) voltage-gated potassium channels
• D) chemically-gated chloride channels

---

Definitions:

Dopamine

A neurotransmitter in the brain that plays a key role in controlling movement, emotional responses, and the brain's reward and pleasure centers.

Parkinson Disease

A neurodegenerative disorder that affects predominately dopamine-producing neurons in a specific area of the brain, leading to symptoms like tremors, stiffness, and difficulty with balance and coordination.

Midbrain

The middle portion of the brainstem, playing an important role in the processing of visual and auditory information, as well as motor control.

Acetylcholine

A neurotransmitter in both the central and peripheral nervous systems that plays a key role in arousal, attention, memory, and motivation.