The basic conducting unit of the nervous system is the neuron. Neurons pick up information through dendrites and are capable of transmitting chemical information along the axon to other neurons, muscles, or glands through electrical conduction down the axon. In this lab we will investigate three types of neuronal transmission: 1. Sensory neurons that transmit information from sense organ or receptors in eyes, ears, taste buds, olfactory organs, and sense receptors of the skin. 2. Interneurons that make up most of the neurons in the brain and spinal cord. 3. Motor neurons that transmit signals to muscles. In addition to neurons, nervous tissue contains many supporting cells called glia. Glial cells have a number of different roles that support and protect the nervous system. One of the types of glial cells is the Schwann cell that wraps around the axon in motor neurons to make a protective layer, the myelin sheath.