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What are the two basic factors that interact to produce skin color?
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- The antagonistic actions in the autonomic nervous system refer to the opposing actions of the sympathetic and parasympathetic divisions of the system on a given organ or tissue.The sympathetic division typically activates the "fight or flight" response, which involves an increase in heart rate, blood pressure, and respiration, as well as the release of glucose into the bloodstream. It also causes the relaxation of certain smooth muscles, such as those in the airways and blood vessels that lead to skeletal muscles, while causing the contraction of others, such as those in the blood vessels that lead to non-essential organs like the digestive system.In contrast, the parasympathetic division typically promotes a "rest and digest" response, which involves a decrease in heart rate, blood pressure, and respiration, and an increase in digestion and absorption of nutrients. It causes the constriction of pupils, and the stimulation of certain smooth muscles, like those that aid in digestion, and the relaxation of others, such as those in the airways and blood vessels that lead to skeletal muscles.Thus, the sympathetic and parasympathetic divisions have antagonistic actions on many organs and tissues, with one division stimulating and the other inhibiting the same process, to maintain a balance and regulate homeostasis in the body.Regenerate response
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