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Human Anatomy, 6/e
Kent Van De Graaff, Weber State University

Autonomic Nervous System

Feedback True or False Quiz

Please answer all questions. The numbers at the end of each question refer to the textbook page where the question topic is discussed.



1

A preganglionic neuron is located between a receptor organ and a sensory ganglion. (435)
A)True
B)False
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
3

Damage to an autonomic nerve makes its target muscle less sensitive than normal to stimulating agents. (436)
A)True
B)False
4

Denervation of a skeletal, smooth, or cardiac muscle results in paralysis. (436)
A)True
B)False
5

Neurotransmitter chemicals always stimulate the effector organ. (444)
A)True
B)False
6

Smooth muscles do not contain actin and myosin because, unlike skeletal and cardiac muscles, they are nonstriated. (437)
A)True
B)False
7

The sympathetic division of the autonomic nervous system is also known as the craniosacral division. (440)
A)True
B)False
8

The gray rami communicantes travel distally within the spinal nerves to innervate their effector organs with sympathetic fibers. (439)
A)True
B)False
9

The celiac, superior mesenteric, and inferior mesenteric ganglia are peripheral ganglia. (440)
A)True
B)False
10

The adrenal medulla is a modified sympathetic ganglion whose cells are derived from postganglionic sympathetic neurons. (440)
A)True
B)False
11

The vagus (tenth cranial) nerves provide the most extensive sympathetic innervation in the body. (441)
A)True
B)False
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
13

The effectors of the sympathetic division are activated as a whole when autonomically stimulated. (439)
A)True
B)False
14

Parasympathetic stimulation through the vagus (tenth cranial) nerves results in slowing of the heart rate. (444)
A)True
B)False
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
16

The dual innervation of sympathetic and parasympathetic fibers to the salivary glands results in antagonistic effects. (446)
A)True
B)False
17

Erection of the penis and ejaculation are caused by stimulation through parasympathetic nerves. (446)
A)True
B)False
18

Both the sympathetic and parasympathetic systems are directly involved in thermoregulatory responses to heat. (447)
A)True
B)False
19

Sympathetic stimulation to sweat glands causes the release of bradykinin, which stimulates dilation of the surface blood vessels. (447)
A)True
B)False
20

The autonomic activities of the hypothalamus function independently of the higher brain centers. (449)
A)True
B)False
21

Voluntary effectors, such as skeletal muscle, are regulated by autonomic motor impulses through the autonomic nervous system. (435)
A)TRUE
B)FALSE