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25 July, 12:49

Which of the following is an example of antagonistic control? Which of the following is an example of antagonistic control? The vagus nerve innervates much of the viscera, changing the function of each of them independently of the others. Sympathetic stimulation causes renin secretion by the kidneys, but the kidneys are not innervated by the parasympathetic nervous system. Parasympathetic stimulation causes bronchoconstriction, while sympathetic stimulation causes bronchodilation. The parasympathetic nervous system originates from the brain stem and pelvic nerves, while the sympathetic arises from the thoracic and lumbar spinal cord. Request Answer

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  1. 25 July, 12:51
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    Parasympathetic stimulation causes bronchoconstriction, while sympathetic stimulation causes bronchodilation.

    Explanation:

    The parasympathetic division of autonomous nervous system stimulates contraction of smooth muscles present in walls of blood vessels leading to a reduction in their diameter, that is bronchoconstriction.

    The sympathetic division of the autonomous nervous system has an opposite effect on the diameter of blood vessels. It causes widening of blood vessels, that is bronchodilation.

    The opposite impacts of stimulation of parasympathetic and sympathetic divisions regulate the diameter of blood vessels. Since the effect of parasympathetic division on the blood vessels diameter is opposed by sympathetic division, it represents an example of antagonistic control.
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