A neuron is the basic cell of the nervous system that transmits electrical and chemical signals. On this page you will find an interactive simulation, detailed explanations, and answers to frequently asked questions about how neurons work.
Interactive Simulation: Signal Transmission Through a Neuron
Propagation of a Nerve Impulse Through a Neuron
Watch how the electrical signal travels from the dendrites to the axon!
Visualization: the nerve impulse moves along the neuron (green — active signal)
What Is a Neuron?
A neuron is a specialized cell that conducts electrical impulses. It consists of the cell body (soma), dendrites (which receive signals), and an axon (which passes the signal onward).
Structure of a Neuron
- Dendrites: Short extensions that receive signals from other neurons.
- Soma: The cell body, where signal processing takes place.
- Axon: A long extension that conducts the impulse to the next cell.
- Synapse: The point of contact between neurons for signal transmission.
Stages of Signal Transmission
- Signal reception: Dendrites receive a chemical or electrical stimulus.
- Impulse generation: The soma generates an electrical impulse (action potential).
- Impulse conduction: The impulse travels along the axon to the synapse.
- Signal transmission: The impulse passes through the synapse to the next neuron.
The Role of Neurons in the Body
- Coordination of movement
- Information processing and memory
- Sensation and perception
- Regulation of organ function
Types of Neurons
- Sensory neurons
- Motor neurons
- Interneurons
FAQ: Common Questions About Neurons
1. How many neurons are in the human brain?
The human brain has about 86 billion neurons.
2. How do neurons communicate with each other?
Through synapses — specialized contacts where the signal is transmitted chemically or electrically.
3. Can neurons regenerate?
Some neurons can regenerate, but most neurons in the brain do not recover after damage.
4. What is an action potential?
It is a brief electrical impulse that carries information along a neuron.
5. What diseases are associated with neurons?
Diseases such as Alzheimer's, Parkinson's, and epilepsy are associated with disruptions in neuron function.