_____ is the release of a neural impulse, consisting of a reversal of the electrical charge within the axon.

• A. Diffusion
• B. Resting potential
• C. Trickle charge
• D. Action potential

Answer: (D)

Verified step by step guidance

1. Understand the context: The problem is asking about a specific process related to neural impulses and electrical charges within an axon.
2. Identify key terms: The term 'release of a neural impulse' suggests a process that involves a change in electrical charge.
3. Recall relevant concepts: In neuroscience, the 'action potential' is the process where there is a reversal of electrical charge across the axon membrane, leading to the transmission of a neural impulse.
4. Differentiate from other options: 'Diffusion' refers to the movement of particles from an area of high concentration to low concentration, 'resting potential' is the state of the neuron when not firing a neural impulse, and 'trickle charge' is not a relevant term in this context.
5. Conclude with the correct concept: Based on the understanding of these terms, the correct answer is 'Action potential', as it describes the reversal of electrical charge within the axon during the release of a neural impulse.