Neurons are classified functionally according to the direction the ____________ travels relative to the ____________ . Afferent
neurons are the neurons of the sensory nervous system. They are responsible for conducting ____________ input from both somatic sensory and visceral sensory receptors. Most sensory neurons are ____________ . Efferent neurons are the neurons of the motor nervous system, conducting ____________ output from the CNS to the effectors. All motor neurons are ____________ . Interneurons (or ____________ neurons) lie entirely within the CNS. They receive stimulation from many other neurons and carry out the integrative function of the nervous system. The most numerous types of neurons are ____________ .
Based on their roles, the neurons found in the human nervous system can be divided into three classes: sensory neurons, motor neurons, and interneurons.
