Final answer:
Somatic reflex arcs are controlled by the somatic nervous system and specifically involve the contraction of skeletal muscles, which are responsible for voluntary movements.
Step-by-step explanation:
Somatic Reflex Arcs and Target Tissue
Somatic reflex arcs involve motor responses that are primarily under voluntary control and are facilitated by the somatic nervous system. These reflex arcs target skeletal muscle, which is responsible for the movement of bones and the skeleton. In contrast, the autonomic nervous system regulates involuntary responses and targets non-skeletal muscle tissue such as cardiac and smooth muscle, as well as endocrine glands for hormone secretion. Thus, somatic reflex arcs do not involve these tissues directly, focusing instead on voluntary skeletal muscle movements.