The use of the word rank for Navy enlisted personnel is incorrect. The term is rate.. The rating badge is a combination of rate (pay grade, as indicated by the chevrons) and rating (occupational specialty, as indicated by the symbol just above the chevrons).
Neurons are nerve cells that are constantly sending signals to your brain, muscles and glands. You have over 100 billion neurons in your brain sending signals. The signals help the different parts of your body communicate with each other.
Their dendrites, which receive stimuli from the environment, and their axons, which transmit information about the stimuli, are on the same fiber. The cell body sits off to the side. Multipolar neurons have several branches of dendrites and one axon. Motor neurons, which transmit instructions to muscles, and interneurons, which act as intermediaries between other types of neurons, are both multipolar neurons. Bipolar neurons, such as those in the retina, have dendrites coming out one side and an axon out the other. The connections between cells in nervous tissue are known as synapses. These are actually small gaps between the axon of one neuron and the dendrites of another, across which electrochemical signals are sent.