receptors		connect interneurons to CNS
afferent neurons		nuclei for primitive functions – hunger, thirst
efferent neurons		carry motor signals to effectors
effectors		glands, smooth or cardiac muscle
parasympathetics increase		salivary mucous cell secretion
sympathetics increase		salivary serous cell secretion
hypothalamus (ANS)		nuclei for cardiac and vasomotor control, salivation, swallowing, sweating, bladder control, and pupillary changes
midbrain, pons, and medulla oblongata		detect internal stimuli