The United States Navy has twenty six grades of enlisted sailors and officers, with most sailors enlisting at the entry-level rank of Seaman Recruit (SR, paygrade E-1). The highest rank achievable in the Navy is Fleet Admiral.
Photo by: Sebastian Kaulitzki. The neuron (nerve cell) is the fundamental unit of the nervous system. The basic purpose of a neuron is to receive incoming information and, based upon that information, send a signal to other neurons, muscles, or glands. Neurons are designed to rapidly send signals across physiologically long distances. They do this using electrical signals called nerve impulses or action potentials. When a nerve impulse reaches the end of a neuron, it triggers the release of a chemical, or neurotransmitter. The neurotransmitter travels rapidly across the short gap between cells (the synapse) and acts to signal the adjacent cell.
Therefore, when a signal reaches the relay neuron from the sensory neuron, the relay neurons will directly send a signal to the motor neurons.   The main function of neuron cells are to carry signals.  There are three types of neurons. Sensory, relay, and motor neuron. Sensory neurons carry signals from the r â¦ eceptors in our body (e.g. thermal, pressure etc.) to the relay neurons, which are found in our spinal cord.Relay neurons then send signals along the spinal cord to the brain.ensory, relay, and motor neuron. Sensory neurons carry signals from the receptors in our body (e.g. thermal, pressure etc.) to the relay neurons, which are found in our spinal cord. Relay neurons then send signals along the spinal cord to the brain.