Chapter 14: ANS

25 July 2022
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question
None of the listed responses is correct.
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Which of the following is a way in which the somatic and autonomic nervous systems are similar? ANSWER: Both systems share common efferent pathways. Both systems elicit the same target organ responses to their neurotransmitters. Both systems have ganglia in their motor pathways. Both systems share common effectors. None of the listed responses is correct.
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resting and digesting
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Which of these activities is most likely driven by parasympathetic innervation? ANSWER: fight-or-flight responses sweating and dilating pupils resting and digesting vigorous physical activity
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True
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The sympathetic division innervates targets with nerves that all originate from the thoracolumbar region. ANSWER: True False
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most innervation from the vagus nerve
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Which description is NOT consistent with the sympathetic division? ANSWER: thoracolumbar ganglia close to the spinal cord long postganglionic fibers most innervation from the vagus nerve
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False
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Unlike the sympathetic division, the parasympathetic division synapses with the adrenal medulla. ANSWER: True False
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inferior hypogastric plexus
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Which plexus does NOT receive innervation from the vagus nerve? ANSWER: abdominal aortic plexus inferior hypogastric plexus pulmonary plexuses cardiac plexuses
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The axon can course back into the spinal cord to synapse with preganglionic neurons in a different spinal segment.
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Once a preganglionic axon reaches a trunk ganglion, one of three things can happen to the axon. Which of the following is NOT one of these three things? ANSWER: The axon can ascend or descend the sympathetic trunk to synapse in another trunk ganglion. The axon can course back into the spinal cord to synapse with preganglionic neurons in a different spinal segment. The axon can synapse with a ganglionic neuron in the same trunk ganglion. The axon can pass through the trunk ganglion and emerge from the sympathetic trunk without synapsing.
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False
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The major anatomic difference in autonomic reflex arcs is that there are two sensory afferents. ANSWER: True False
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nicotinic; acetylchline
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Which receptor paring below is correct? ANSWER: nicotinic: norepinephrine muscarinic: norepinephrine nicotinic; acetylchline alpha 1: acetylcholine
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Parasympathetic stimulation causes vasodilation of blood vessels in the penis, leading to erection; sympathetic stimulation then causes ejaculation.
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Which of the following best demonstrates an example of cooperation of the parasympathetic and sympathetic nervous systems? ANSWER: Parasympathetic stimulation causes copious sweating; sympathetic stimulation causes epidermal pores to dilate. Parasympathetic stimulation causes vasodilation of blood vessels in the penis, leading to erection; sympathetic stimulation then causes ejaculation. Sympathetic stimulation causes vasodilation of blood vessels in the penis, leading to erection; parasympathetic stimulation then causes ejaculation. Sympathetic stimulation causes vasodilation of blood vessels in the clitoris, leading to erection; parasympathetic stimulation then causes reflex contractions of the vagina.
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muscarinic receptors
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You are designing a drug to reduce heart rate. Which receptor would you target? ANSWER: ƎĀ²1 adrenergic receptors (1 adrenergic receptors muscarinic receptors nicotinic receptors
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hypothalamus
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Which of the following is responsible for the overall integration of the autonomic nervous system (ANS)? ANSWER: cerebral cortex peripheral ganglia hypothalamus brain stem
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cellular metabolism
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Which of the following target organs/systems is affected by the sympathetic nervous system but is NOT affected by the parasympathetic nervous system? ANSWER: lungs salivary glands cellular metabolism gallbladder
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stimulates secretory activity
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Which of the following is characteristic of the parasympathetic division? ANSWER: dilated airways increased heart rate stimulates secretory activity inhibited digestion and elimination