The term giant is sometimes used when describing nevi. A giant nevus covers a very large part of the body, usually involves the torso, and is usually accompanied by a number of satellite nevi. Satellite nevi (or just satellites) are smaller melanocytic nevi. When a child is born with a giant nevus, it is common for satellite nevi to be present at birth.
Receptors for the various neurotransmitters are located on both the presynaptic and postsynaptic nerve terminals of the neuron.hey are present in all of the nerve cells, but predominately in the ganglia or nerve bundles of invertebrates, and in the central nervous system (brain and spinal cord) of vertebrates. There are many kinds of neurotransmitter chemicals.
The synapse is located at the end of each axonal end branch. Here the end branch forms a small button-like knob, referred to as the synaptic knob. This knob is adjacent to a tiny cleft or synapse. When a nerve impulse reaches this knob, a drug called a neurotransmitter is released from vesicles into the synapse. The neurotransmitter diffuses across the gap and binds to receptors on the membrane of the adjacent neuron or muscle cell.