[Solved] Ammonia is likely to be the primary nitrogenous waste in living conditions that include A) lots of fresh water flowing across the gills of a fish. B) lots of seawater, such as a bird living in a marine environment. C) lots of seawater, such as a marine mammal (e.g., a polar bear). D) a terrestrial environment, such as that supporting crickets. E) a moist system of burrows, such as those of naked mole rats. Parasympathetic Division: Part of the autonomic nervous system that conserves energy and resources during restful states by slowing heart rate and increasing digestive activities. Autonomic Nervous System: A part of the nervous system that controls involuntary functions of the body, including heart rate, digestion, and respiratory rate. Acetylcholine: A neurotransmitter in the brain and peripheral nervous system important for muscle contraction and signaling between nerve cells. Norepinephrine: Norepinephrine is a neurotransmitter and hormone involved in the body's fight or flight response, regulating heart rate, blood pressure, and sugar levels.