Please answer all questions. The numbers at the end of each question refer to the textbook page where the question topic is discussed.
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1 | | Sensory receptors within the sensory organs, neurons, nerves, ganglia, and plexuses are all part of the peripheral nervous system (PNS). (401) |
| | A) | True |
| | B) | False |
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2 | | Sensory nerves consist of nerve fibers that conduct impulses toward the central nervous system (CNS). (403) |
| | A) | True |
| | B) | False |
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3 | | Motor nerves consist of nerve fibers that conduct impulses toward the CNS. (403) |
| | A) | True |
| | B) | False |
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4 | | All of the sensory fibers of one optic nerve cross to the other side at the optic chiasma. (403) |
| | A) | True |
| | B) | False |
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5 | | The terminal location of the visual tract is within the visual cortex of the occipital lobes. (403) |
| | A) | True |
| | B) | False |
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6 | | A persistent constriction of the pupil of the eye may be indicative of trauma to the oculomotor nerve. (404) |
| | A) | True |
| | B) | False |
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7 | | The muscles of mastication are innervated with motor fibers by the maxillary nerve of the trigeminal ganglion. (404) |
| | A) | True |
| | B) | False |
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8 | | Lateral eye movement is caused by the contraction of the lateral rectus ocular muscle as it is being stimulated by impulses through the oculomotor nerve. (404) |
| | A) | True |
| | B) | False |
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9 | | All of the muscles of facial expression and the muscles of mastication are innervated by the facial nerves. (404) |
| | A) | True |
| | B) | False |
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10 | | The vestibulocochlear nerve is purely sensory and responds to auditory sensations through the cochlear nerve and sensations of equilibrium through the vestibular nerve. (409) |
| | A) | True |
| | B) | False |
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11 | | Hunger pangs, gastrointestinal distension, intestinal discomfort, and sensations of laryngeal movements are sensations that must pass through the vague nerves to be perceived. (412) |
| | A) | True |
| | B) | False |
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12 | | The vagus nerve is the only cranial nerve that innervates structures in body regions other than the head. (412) |
| | A) | True |
| | B) | False |
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13 | | There are 31 pairs of spinal nerves, all of which are composed of both motor and sensory fibers. (413) |
| | A) | True |
| | B) | False |
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14 | | Although there are seven cervical vertebrae, there are eight cervical spinal nerves. (413) |
| | A) | True |
| | B) | False |
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15 | | An anterior ramus of a spinal nerve innervates muscles and skin on the lateral and anterior side of the trunk. (414) |
| | A) | True |
| | B) | False |
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16 | | The brachial plexus is so named because it is formed in the superior portion of the brachial region, lateral to the axilla. (416) |
| | A) | True |
| | B) | False |
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17 | | Visceral reflexes never involve skeletal muscles. (427) |
| | A) | True |
| | B) | False |
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18 | | A root is defined as a group of cell bodies. (414) |
| | A) | True |
| | B) | False |
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19 | | The sciatic nerve is the largest nerve arising from the sacral plexus, however it is not the largest nerve in the body. (421) |
| | A) | True |
| | B) | False |
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20 | | A visceral reflex causes smooth or cardiac muscle to contract or glands to secrete. (427) |
| | A) | True |
| | B) | False |
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