The mighty texan had it correct, the ANS primarily receives information from the viscera, and also it contains a lot of our chemoreceptors and some of the functions of taste and smell. The somatic nervous system tends to convery sensory information from the skin and muscles. The patellar reflex would in fact be a somatic reflex arc, that exhibits both direct and interneuron regulated reflexes, the interneuron side is the inhibitory signal to the hamstring, aka reciprocal innervation. ANS reflex arcs involve the internal organs.