Dendrites are A. the conduction zone of a nerve cell. B. the input zone of a nerve cell. C. a type of glial cell. D. small interneurons.

B. the input zone of a nerve cell.

Explanation:

Dendrites are the small extensions that come out of the soma or cell body of a neuron. The function of dendrites is to receive the nerve signals or information from the axons of the presynaptic neurons and carry them towards the cell body or soma. In a synapse, the signals from the axons of the presynaptic neurons are revived by dendrites of postsynaptic neurons. The plasma membrane of dendrites have receptors to which the chemical messengers from other cells bind. In this way, dendrites serve as input zone of a nerve cell.