A&P Chapter 21: Peripheral Nervous System Flashcards
- Which of the following is an incorrect statement?
a. There are 7 cervical nerve pairs.
b. There are 12 thoracic nerve pairs.
c. There are 5 lumbar nerve pairs.
d. All of the above are correct statements.
- a. There are 7 cervical nerve pairs.
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Chapter 21: Peripheral Nervous System
- The spinal root that has a noticeable swelling is the:
a. ventral root.
b. anterior root.
c. dorsal root.
d. none of the above.
- c. dorsal root.
p. 481
Chapter 21: Peripheral Nervous System
- The dorsal root ganglion contains:
a. sensory neuron cell bodies.
b. motor neuron cell bodies.
c. both sensory neuron and motor neuron cell bodies.
d. motor neuron fibers.
- a. sensory neuron cell bodies.
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Chapter 21: Peripheral Nervous System
- The phrenic nerve innervates the:
a. spleen.
b. diaphragm.
c. chest muscles.
d. none of the above.
- b. diaphragm.
p. 483
Chapter 21: Peripheral Nervous System
- The femoral nerve arises from the:
a. lumbar plexus.
b. sacral plexus.
c. coccygeal plexus.
d. brachial plexus.
- a. lumbar plexus.
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Chapter 21: Peripheral Nervous System
- ______ The lower end of the spinal cord is called the cauda equina.
True or False
- True
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Chapter 21: Peripheral Nervous System
- ______ There are 31 pairs of spinal nerves, all of which are composed of both motor and sensory fibers.
True or False
- True
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Chapter 21: Peripheral Nervous System
- ______ Herpes zoster is a unique bacterial infection that almost always affects the skin of a single dermatome.
True or False
- False
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Chapter 21: Peripheral Nervous System
- ______ Dermatome is a term referring to a skeletal muscle group innervated by motor neuron axons from a given spinal nerve.
True or False
- False
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Chapter 21: Peripheral Nervous System
- ______ The brachial plexus is found deep within the shoulder.
True or False
- True
p. 485
Chapter 21: Peripheral Nervous System
- Somatic effectors are:
a. smooth muscle.
b. skeletal muscle.
c. cardiac muscle.
d. glands.
- b. skeletal muscle.
p. 495
Chapter 21: Peripheral Nervous System
- When the outer sole of the foot is stimulated, a normal infant will extend the great toe. This is called the:
a. Babinski reflex.
b. plantar reflex.
c. tendon reflex.
d. corneal reflex.
- a. Babinski reflex.
p. 497
Chapter 21: Peripheral Nervous System
- Which is the neurotransmitter in a somatic motor pathway?
a. acetylcholine
b. amines
c. amino acids
d. neuropeptides
- a. acetylcholine
p. 495
Chapter 21: Peripheral Nervous System
Applying What You Know!
- Ethan had difficulty swallowing and he noticed his mouth was extremely dry. The doctor advised him that the problem may be related to a nerve.
Question a. What two nerves might possibly be causing the problem?
Question b. These nerves are mixed nerves. What is meant by that statement?
- (a) The two nerves that might possibly be involved are cranial nerve IX (glossopharyngeal) and cranial nerve X (vagus).
(b) Both nerves are mixed, meaning that they contain axons of sensory and motor neurons.
Chapter 21: Peripheral Nervous System
Applying What You Know!
- Mason is under great stress from trying to advance in his career, pursue graduate school, and raise two small children. After a particularly stressful event, he noticed a burning sensation in his axillary and pectoral regions. Days later he experienced an eruption of red swollen plaques in the same area.
Question a. What condition is he experiencing?
Question b. What is the name of the responsible pathogen?
Question c. Why did he experience the symptoms that he did?
Question d. What may be the reason that the pathogen was capable of breaching his immune system?
- (a) Herpes zoster, or shingles.
(b) Varicella zoster virus, or chickenpox.
(c) It attacks a dermatome (T-4) and symptoms occur in that region.
(d) His immunologic protective mechanism may have become diminished due to the stress.
Chapter 21: Peripheral Nervous System
- Which one of the following doesn’t have a sensory function?
a. abducens
b. trigeminal
c. facial
d. vagus
- a. abducens
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Chapter 21: Peripheral Nervous System
