Neuronal physiology is the study of how neurons, the fundamental units of the nervous system, function. Neurons communicate through electrical impulses called action potentials, which are generated when a neuron receives sufficient stimulation. This process involves the movement of ions, such as sodium and potassium, across the neuron's membrane, leading to changes in voltage. Neurons also communicate chemically through neurotransmitters, which are released at synapses, the junctions between neurons. These neurotransmitters bind to receptors on neighboring neurons, influencing their activity. Understanding neuronal physiology is essential for comprehending how the brain and nervous system control behavior, movement, and sensory perception.