Final answer:
The parasympathetic and sympathetic divisions of the autonomic nervous system have opposite effects on various systems in the body.
Step-by-step explanation:
The statement given in the question, The parasympathetic and sympathetic divisions always act with a cooperative influence, and through summation of the impulses, the effect can be increased, is False. The parasympathetic and sympathetic divisions of the autonomic nervous system have opposite effects on various systems in the body. While the sympathetic division is associated with the fight-or-flight response and increases heart rate and breathing rate, the parasympathetic division is associated with rest and digest and slows down heart rate and promotes digestion.