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Ex2Fall08Key - Examination II VPHY 3100 Elements of...

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Examination II VPHY 3100 Elements of Physiology October 13th, 2008 1:25 - 2:15 p.m. Multiple Choice (2.5 points each) FOR EACH QUESTION, CHOOSE THE SINGLE BEST ANSWER. 1. The autonomic and somatic motor systems are different in that: A. somatic motor neurons innervate viscera whereas autonomic motor neurons innervate skeletal muscle. B. for a given effector organ, innervation on the somatic side is achieved via two efferent neurons whereas innervation on the autonomic side is achieved via one efferent neuron. C. only autonomic motor neuron cell bodies can lie within ganglia. D. only somatic motor neuron cell bodies can lie within the spinal cord. E. only on the somatic side does efferent information exit the spinal cord via the ventral roots. 2. Which of the following is not a typical response of the parasympathetic division of the autonomic nervous system? 3. The splanchnic nerves, paravertebral ganglia, and collateral ganglia are all part of the: 4. Preganglionic fibers of the parasympathetic division are ___________________ and typically synapse with postganglionic neurons in ____________________, 5. β -receptors and muscarinic receptors are similar in that: A. they are activated by binding of acetylcholine. B. they are activated by binding of norepinephrine. C. they are ligand-gated ion channels. D. calcium is the intracellular second messenger generated downstream of receptor activation. E. they are G-protein-coupled receptors. 6. Vagal innervation of the heart activates __________________, which ultimately slows the heart rate via the _________________. 1
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