human
Can you tell me how the brain works?
assistant
The brain is made up of billions of cells called neurons that are connected to each other by synapses. Neurons receive signals from other neurons, and then they send out signals to other neurons. This process is known as communication between neurons. When a neuron receives a signal, it sends a chemical signal to another neuron which causes it to fire. This action is called an action potential. Action potentials are the basis for all electrical activity in the brain.