What happens during action potential in neurons?

• A. Ions move into the dendrites
• B. A chemical signal is released
• C. A wave of electrical discharge travels down the axon
• D. The cell body starts to decay

Answer: (C)

During an action potential in neurons, a wave of electrical discharge travels down the axon, which is a crucial aspect of how neurons communicate. This process is initiated when a neuron reaches a certain threshold of depolarization, causing voltage-gated sodium channels to open. Sodium ions flood into the neuron, causing the interior of the cell to become positively charged relative to the outside. This rapid change in electrical charge propagates along the axon, allowing the action potential to travel from the cell body toward the axon terminals.

As the action potential moves down the axon, it triggers the release of neurotransmitters at the synaptic terminals, facilitating communication with other neurons. This sequence of events is essential for neuronal signaling and ultimately underlies all nervous system functions, including reflexes, movement, and thought processes.

The other options refer to processes that do not directly characterize the action potential. While ions do play a role in the overall function of neurons, their movement primarily occurs along the axon during the action potential, rather than into dendrites at this stage. Chemical signals are involved in synaptic transmission but are not the direct event of action potential generation itself. The decay of the cell body is unrelated to the function of the action potential and instead