Nicotinic receptors bind
A. acetylcholine and allow chloride ions to exit the cell.
B. acetylcholine and allow sodium ions to enter the cell.
C. muscarine and increase the contractility of intestinal muscle.
D. norepinephrine and can either stimulate or inhibit the cell.
E. norepinephrine and allow potassium entry, thereby exciting the cell.
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Question 2) Muscarinic receptors are proteins that bind the neurotransmitter
A. acetylcholine.
B. epinephrine.
C. norepinephrine.
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Question 3) When ACh binds to nicotinic receptors, it
A. always produces an excitatory response.
B. always produces an inhibitory response.
C. sometimes excites and sometimes inhibits the target cell depending on the subtype of receptor.
D. sometimes excites and sometimes inhibits the target cell depending on the extracellular fluid surrounding the cell.
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Question 4) The cardiac sphincter is innervated by parasympathetic axons coming from the _______ plexus.
A. esophageal
B. abdominal aortic
C. pulmonary
D. hypogastric
E. cardiac
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Question 5) The arrector pili muscles receive their sympathetic innervation via the
A. splanchnic nerve pathway.
B. adrenal medulla pathway.
C. postganglionic sympathetic nerve pathway.
D. spinal nerve pathway.
E. None of the choices is correct.
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Question 6) The sympathetic division pathway that results in innervation of the pelvic organs has its spinal cord segment origin in
A.
T1-T2.
B.
T1-L2.
C.
T1-T4.
D.
T5-T12.
E.
T10-L2.
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Question 7) Which autonomic plexus consists of postganglionic sympathetic axons that come off the cervical and thoracic sympathetic trunk ganglia, as well as preganglionic axons from the vagus nerve?
A. Esophageal plexus
B. Pulmonary plexus
C. Abdominal aortic plexus
D. Hypogastric plexus
E. Cardiac plexus
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Question 8) . Which sympathetic pathway involves a preganglionic neuron that synapses with a ganglionic neuron in a sympathetic trunk ganglion, but the postganglionic axon does not leave the trunk via a gray ramus?
A. Splanchnic nerve pathway
B. Adrenal medulla pathway
C. Postganglionic sympathetic nerve pathway
D. Spinal nerve pathway
E. None of the choices is correct.
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Question 9) Which sympathetic pathway involves only a preganglionic axon going to the effector organ?
A. Splanchnic nerve pathway
B. Adrenal medulla pathway
C. Postganglionic sympathetic nerve pathway
D. Spinal nerve pathway
E. None of the choices is correct.
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Question 10) Sympathetic splanchnic nerves are composed of
A. preganglionic sympathetic axons that synapse in a sympathetic trunk ganglion.
B. preganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion.
C. postganglionic sympathetic axons that synapse in a sympathetic trunk ganglion.
D. postganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion.
E. None of the choices is correct.
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