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 | |
A preganglionic neuron is located between a receptor organ and a sensory ganglion. (435) |
| | A) | True |
| | B) | False |
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2 | |
The origins of the preganglionic fibers and the locations of the autonomic ganglia help to differentiate the sympathetic and parasympathetic subdivisions of the autonomic nervous system. (435) |
| | A) | True |
| | B) | False |
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3 | |
Damage to an autonomic nerve makes its target muscle less sensitive than normal to stimulating agents. (436) |
| | A) | True |
| | B) | False |
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4 | |
Denervation of a skeletal, smooth, or cardiac muscle results in paralysis. (436) |
| | A) | True |
| | B) | False |
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5 | |
Neurotransmitter chemicals always stimulate the effector organ. (444) |
| | A) | True |
| | B) | False |
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6 | |
Smooth muscles do not contain actin and myosin because, unlike skeletal and cardiac muscles, they are nonstriated. (437) |
| | A) | True |
| | B) | False |
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7 | |
The sympathetic division of the autonomic nervous system is also known as the craniosacral division. (440) |
| | A) | True |
| | B) | False |
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8 | |
The gray rami communicantes travel distally within the spinal nerves to innervate their effector organs with sympathetic fibers. (439) |
| | A) | True |
| | B) | False |
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9 | |
The celiac, superior mesenteric, and inferior mesenteric ganglia are peripheral ganglia. (440) |
| | A) | True |
| | B) | False |
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10 | |
The adrenal medulla is a modified sympathetic ganglion whose cells are derived from postganglionic sympathetic neurons. (440) |
| | A) | True |
| | B) | False |
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11 | |
The vagus (tenth cranial) nerves provide the most extensive sympathetic innervation in the body. (441) |
| | A) | True |
| | B) | False |
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12 | |
The celiac plexus and plexuses of the abdominal portion of the aorta are composed of nerve fibers arising only from the spinal cord. (441) |
| | A) | True |
| | B) | False |
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13 | |
The effectors of the sympathetic division are activated as a whole when autonomically stimulated. (439) |
| | A) | True |
| | B) | False |
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14 | |
Parasympathetic stimulation through the vagus (tenth cranial) nerves results in slowing of the heart rate. (444) |
| | A) | True |
| | B) | False |
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15 | |
Since the same heart cells are innervated by both sympathetic and parasympathetic fibers, the heart experiences the antagonistic effects of the two autonomic divisions. (446) |
| | A) | True |
| | B) | False |
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16 | |
The dual innervation of sympathetic and parasympathetic fibers to the salivary glands results in antagonistic effects. (446) |
| | A) | True |
| | B) | False |
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17 | |
Erection of the penis and ejaculation are caused by stimulation through parasympathetic nerves. (446) |
| | A) | True |
| | B) | False |
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18 | |
Both the sympathetic and parasympathetic systems are directly involved in thermoregulatory responses to heat. (447) |
| | A) | True |
| | B) | False |
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19 | |
Sympathetic stimulation to sweat glands causes the release of bradykinin, which stimulates dilation of the surface blood vessels. (447) |
| | A) | True |
| | B) | False |
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20 | |
The autonomic activities of the hypothalamus function independently of the higher brain centers. (449) |
| | A) | True |
| | B) | False |
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21 | |
Voluntary effectors, such as skeletal muscle, are regulated by autonomic motor impulses through the autonomic nervous system. (435) |
| | A) | TRUE |
| | B) | FALSE |
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2002 McGraw-Hill Higher Education