A short stretch of RNA with a free 3' end, bound by complementary base pairing to the template strand, that is elongated with DNA nucleotides during DNA replication.
Two general types of cells are found in the nervous system: neurons and neuroglia. A. Neurons 1. Consist of three main partsâdendrites (conduct impulses to cell body of neuron); cell body of neuron; and axon (conducts impulses away from cell body of neuron) 2.he nervous system transmits information rapidly by means of nerve impulses conducted from one body area to another. The nervous system is made up of the brain and spinal cord, and the many nerves of the body.
The cell body is mainly responsible for meeting the metabolic needs of the cell and its position with respect to the axon and dendrites is somewhat variable. The drawing below shows you a type of neuron you will encounter in your study of the peripheral nervous system. It is a dorsal root ganglion cell, or primary sensory neuron. Note that the arrangement of dendrites, cell body and axon is somewhat different than for the neuron drawn above. Note that over part of its length, the sensory axon is actually conducting nerve impulses TOWARD the cell body; over the rest of its length the axon is conducting nerve impulses AWAY from the cell body.