Final Answer:
Dual innervation describes a scenario in which a target organ has innervation from both the b) sympathetic and c) parasympathetic nervous systems.
Step-by-step explanation:
Dual Innervation: The term "dual innervation" refers to the situation where a target organ receives nerve fibers from both the sympathetic and parasympathetic divisions of the autonomic nervous system.
Target Organ: The phrase "target organ" in the question implies an organ or tissue that is regulated by the autonomic nervous system. Examples include the heart, digestive organs, and glands.
Sympathetic and Parasympathetic: The options include both "sympathetic" and "parasympathetic," indicating that the correct answer involves the coexistence of these two divisions in innervating the target organ.
Neither: The option "neither" is not true in the context of dual innervation, as the defining characteristic of dual innervation is the presence of both sympathetic and parasympathetic innervation.
Dual innervation describes a scenario in which a target organ has innervation from both the b) sympathetic and c) parasympathetic nervous systems.